MacBook Air M3 15 vs Alienware m18 R2

Side-by-side comparison with real-scale visuals and detailed specifications

100% Objective Comparisons — Data sourced from official manufacturers

See our methodology

100%

Alienware m18 R2 is NaN% taller

MacBook Air M3 15

mm×345.4mm

Alienware m18 R2

30mm×426mm

Scaled to real proportions

Specifications Comparison

MacBook Air M3 15

Apple

2 wins

Alienware m18 R2

Dell

4 wins

📱

Display

Diagonal screen measurement

Better

MacBook Air M3 15

15.3"

Alienware m18 R2

18"

Difference: 2.7" (17.6% more)

⚖️

Weight

Total device weight

Better

MacBook Air M3 15

1.51kg

Alienware m18 R2

3.89kg

Difference: 2.38kg (157.6% less)

🔋

Battery

Battery capacity in watt-hours

Better

MacBook Air M3 15

66.5Wh

Alienware m18 R2

97Wh

Difference: 30.5Wh (45.9% more)

💾

RAM

Random Access Memory for multitasking

Better

MacBook Air M3 15

16GB

Alienware m18 R2

64GB

Difference: 48GB (300.0% more)

💿

Storage

Internal storage capacity

Better

MacBook Air M3 15

256GB

Alienware m18 R2

2,048GB

Difference: 1,792GB (700.0% more)

🧠

Processor

CPU/SoC model

MacBook Air M3 15

Apple M3

Alienware m18 R2

Intel Core i9-14900HX

💰

Price

Retail price in USD

Better

MacBook Air M3 15

1,299$

Alienware m18 R2

3,299$

Difference: 2,000$ (154.0% less)

MacBook Air M3 15

Alienware m18 R2

Winner in category

Last updated: March 22, 2026

Source: apple.com

Last updated: March 22, 2026

Source: dell.com

Why Trust Our Comparisons

Verified Data

All specs verified from official sources

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Regularly Updated

Data refreshed when specs change

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Our comparison methodology is public

SizeVS Editorial Team

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Product Comparison Specialists

Our team of tech enthusiasts and data analysts work to provide accurate, unbiased product comparisons.

Verified Data Sources Editorial Standards

Updated: March 24, 2026

Our methodology

Explore this matchup

View MacBook Air M3 15 View Alienware m18 R2 Display Weight Battery RAM Storage

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