Comparing and contrasting is a vital technique for academic writing. It analyzes the similarities and differences between two or more subjects. In an essay, you may be asked to compare and/or contrast historical events, literary works, theories, research methods, or perspectives. 

This analytical process is key for constructing well-reasoned arguments. When done effectively, compare and contrast supports a deeper understanding of the subjects and their relevance and significance. 

It provides a framework for evaluating the relative strengths and weaknesses, extracting new knowledge, and ultimately driving well-substantiated conclusions and insights.  

When should I compare and contrast?

Comparing and contrasting is a useful technique to employ when your essay aims:

  • To analyze similarities and differences between subjects
  • To establish relevance between seemingly distinct topics
  • To make a persuasive argument about which subject is superior
  • To provide a new perspective on the relationship between subjects
  • To clarify complex concepts by showing how they interact

Many essay assignments will explicitly prompt or invite you to compare subjects by using directed language in the prompt.

Compare-and-contrast prompts

These prompts directly instruct you to compare and/or contrast two or more subjects. They use explicit language like:

  • Compare the cultural narratives underlying these two novels and how they relate to their historical contexts.”
  • Contrast the underlying philosophies of the two political thinkers and analyze the differing implications for society.”
  • Compare and contrast the research methods used in these three experiments, evaluating their strengths and weaknesses.”

General prompt

Some prompts are more open-ended about the precise analytical approach:

  • “Discuss the lasting impacts of the 1960s counterculture movement on American society.”

This general prompt doesn’t explicitly call for comparison until you determine that analyzing the counterculture alongside mainstream culture is an effective way to examine its impacts and draw insights.

Making effective comparisons

When comparing and contrasting, the key is identifying reasonable similarities and differences between the two subjects. You may contrast different topics to highlight their distinctions or compare similar subjects to analyze. However, the subjects must share some meaningful basis for comparison from the outset.

You could effectively contrast two time periods for the same population’s dietary habits – like contrasting the nutritional intake of Americans before and after the national nutrition labeling laws were implemented in the 1990s. There’s a clear basis for comparison as it analyzes the same group’s eating behaviors triggered by a significant regulatory event.

However, contrasting the diets of modern-day Americans with those of an ancient hunter-gatherer society would likely leave readers confused about the purpose of comparing the different nutritional contexts from separate eras and lifestyles. 

A focused thesis statement is crucial in comparative essays to clarify the purpose of the comparisons. Each comparison should support the central argument, and the writer must communicate this clearly to the reader.

Comparing and contrasting as a brainstorming tool

Comparing and contrasting ideas is a powerful brainstorming technique. Examining similarities and differences between concepts can reveal connections, challenge assumptions, and inspire new perspectives. Using this approach, you can systematically explore a problem, uncover insights, and generate innovative solutions.

Let’s say you’re interested in examining the different approaches to weight management. You could create a comparison table to explore the similarities and differences between two popular weight loss methods:

CharacteristicCalorie-Counting DietsIntuitive Eating
ApproachFocuses on restricting caloric intake to create a calorie deficitEncourages listening to internal hunger/fullness cues and eating what the body wants
MindsetEmphasizes willpower and control over food intakePromotes a non-restrictive, non-diet mentality
Relationship with FoodViews food primarily as fuel can lead to feelings of deprivationViews food as nourishment and enjoyment, aims to eliminate guilt around eating
Role of ExerciseEmphasizes burning calories through exerciseEncourages joyful movement, not necessarily for weight loss
Long-Term OutcomesCan lead to yo-yo dieting and a focus on the number on the scaleAims to cultivate a healthy, sustainable relationship with food and one’s body
Key ProponentsWeight Watchers, calorie counting appsEvelyn Tribole, Elyse Resch (Intuitive Eating approach)

Structuring your comparisons

When structuring a comparative analysis, there are two primary organizational methods to consider: the alternating method and the block method.

The alternating method

The alternating method involves discussing one aspect of both items and then moving to the next aspect, alternating between the two. This creates an A-B-A-B pattern, where each section examines a specific point of comparison between the two items. 

Comparison PointSubject 1Subject 2
A
B

This approach is effective when the goal is to systematically highlight the similarities and differences between corresponding elements. The back-and-forth structure allows the writer to draw direct contrasts, helping the reader more easily identify connections and distinctions. However, this method can sometimes feel fragmented if not handled carefully.

Alternating method example

An alternating method approach can be effective when comparing the sustainability practices of two major tech companies. In the area of energy use and emissions, Company A has set ambitious targets to transition to 100% renewable energy by 2030, while Company B has been slower to commit to renewable sources, relying more heavily on non-renewable power.

Turning to waste reduction and recycling, Company A operates robust recycling and composting programs that divert the majority of its waste from landfills. In contrast, Company B’s waste management efforts are more limited, with lower recycling rates and fewer initiatives to minimize waste.

The companies also differ in their approaches to product lifecycle and repairability. Company A designs its hardware to be easily repairable and upgradable, encouraging longer product lifespans. Conversely, Company B’s products often have shorter lifespans due to proprietary components that are difficult for users to repair or replace.

In examining supply chain sustainability, Company A works closely with suppliers to implement social and environmental standards and closely monitor compliance. Company B’s supply chain visibility and sustainability practices, however, are less transparent and comprehensive.

The block method

The block method organizes the comparative analysis by discussing all aspects of one item, followed by all aspects of the other item. This A-B structure provides a more holistic, big-picture comparison between the two items. 


Subject 1
Subject 2
Point of Comparison A
Point of Comparison B

The block method is well-suited when the aim is to offer a comprehensive overview of each item before drawing connections and contrasts. This approach can make the comparative analysis feel more cohesive, though the reader may have to work a bit harder to identify the specific points of comparison.

Block method example

Comparing Tech Company Sustainability Practices

Company A

Company A has made sustainability a core part of its business strategy. It has set aggressive targets to transition its global operations to 100% renewable energy by 2030. The company also operates robust recycling and composting programs at its facilities, diverting the majority of waste from landfills. 

Regarding product design, Company A focuses on creating hardware that is easily repairable and upgradable, encouraging longer product lifespans. They also work closely with suppliers to implement environmental and social responsibility standards throughout their supply chain.

Company B

In contrast, Company B has been slower in prioritizing sustainability initiatives. Their operations rely heavily on non-renewable energy sources to power data centers and offices. Waste reduction and recycling efforts are more limited, with lower diversion rates.

Additionally, Company B’s product design favors shorter lifespans, with components that are difficult for users to repair or replace. Their supply chain sustainability practices also lack the same level of transparency and oversight as Company A.

The alternating and block methods for comparative analysis can be effectively combined within a larger essay. The different organizational approaches can be strategically planned in an essay outline, with some paragraphs using the alternating point-by-point structure and others taking the more holistic block format.