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Lexar SL100 Pro 1TB vs Lexar SL660 1TB — Which External SSD Is Faster & Better Value?

Compare Lexar SL100 Pro 1TB and Lexar SL660 1TB side by side. Both are 1TB USB 3.2 Gen 2 external SSDs, but they differ in speed, design, and value. Here's how they stack up.

Lexar

Lexar SL100 Pro 1TB

7.5/10

A 950 MB/s Gen 2 portable in a brushed-aluminum case the size of a credit card. The SL100 Pro is one of the smallest 1TB Gen 2 SSDs at retail — buy it for the form factor, not the rated speed (which undershoots the Gen 2 ceiling).

Brushed-aluminum case

950 MB/s read

Tiny credit-card footprint

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Our Pick

Lexar

Lexar SL660 1TB

8.1/10

A premium 2000 MB/s Gen 2x2 portable with an aluminum body and an RGB-lit Logo. The RGB is a divisive feature but the performance is real, and the build quality distinguishes it from cheaper Gen 2x2 peers like the Patriot Evlvr.

Gen 2x2 2000/2000 MB/s

Aluminum body

3-year warranty

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Spec Comparison

Spec

Lexar SL100 Pro 1TB

Lexar SL660 1TB

Read Speed

950 MB/s

2.0 GB/s ✓

Write Speed

950 MB/s

2.0 GB/s ✓

Capacity

1 TB

Interface

USB 3.2 Gen 2

USB 3.2 Gen 2x2

Endurance (TBW)

600 TB

Warranty

3 Years

Score

7.5/10

8.1/10 ✓

Total Wins

0 wins

3 wins

Frequently Asked Questions

Which is better, Lexar SL100 Pro 1TB or Lexar SL660 1TB?

The Lexar SL660 1TB scores 8.1/10 compared to 7.5/10 for the Lexar SL100 Pro 1TB. Our expert analysis favors the Lexar SL660 1TB for its superior speed.

What's the difference between Lexar SL100 Pro 1TB and Lexar SL660 1TB?

The key differences: The Lexar SL100 Pro 1TB offers 950 MB/s reads vs 2,000 MB/s for the Lexar SL660 1TB. Capacity options differ: Lexar SL100 Pro 1TB is 1TB while Lexar SL660 1TB is 1TB. The Lexar SL100 Pro 1TB uses USB 3.2 Gen 2 while the Lexar SL660 1TB uses USB 3.2 Gen 2x2.

Which is faster, Lexar SL100 Pro 1TB or Lexar SL660 1TB?

The Lexar SL660 1TB is faster with 2,000 MB/s read speeds compared to 950 MB/s for the Lexar SL100 Pro 1TB. That's a 111% speed advantage.

Which has better value, Lexar SL100 Pro 1TB or Lexar SL660 1TB?

The Lexar SL660 1TB scores higher (8.1 vs 7.5/10), indicating better overall value in our evaluation. Check both models on the retailer's site for the latest details.

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