Browsing speed:
Mozilla Kraken 1.1:

QuoteLenovo Yoga Slim 7a 14AGP11
Radeon 840M, Ryzen AI 7 445, Micron 2600 1TB MTFDKBA1T0QHK   
480 ms

Quote from: notebookcheck.net/Apple-MacBook-Air-15-M5-Review-Very-powerful-fanless-and-without-competition.1244905.0.htmlApple MacBook Air 15 M5
M5 10-Core GPU, M5 10-Core, Apple SSD AP2048Z   
238.6 ms

This makes the Air 2 times faster in this benchmark.

WebXPRT 4:

QuoteLenovo Yoga Slim 7a 14AGP11
Radeon 840M, Ryzen AI 7 445, Micron 2600 1TB MTFDKBA1T0QHK   
242 Points

Quote from: notebookcheck.net/Apple-MacBook-Air-15-M5-Review-Very-powerful-fanless-and-without-competition.1244905.0.htmlApple MacBook Air 15 M5
M5 10-Core GPU, M5 10-Core, Apple SSD AP2048Z   
378 Points

Air is 56 % faster.

Speedometer 3.1: (NotebookCHECK, why not test Speedometer, it takes 1 minute and it's a free benchmark)
Air M5: 63 (using Apple's native Safari browser and 45 using Firefox)
Ryzen AI 7 445: Approximately 30 (based on desktop CPU Zen 5 results (score: 36) from here: hothardware.com/news/amd-zen-5-benchmark-discrepancies)

Gaming -- iGPU performance:
3dmark.com/search Steel Nomad:
(Time Spy's official successor is Steel Nomad, why not test it? But don't worry, 3dmark.com/search has us covered:)
Air 13 M5: Average score: 1066
Radeon 840M: Average score: 255
This makes the Air over 4 times faster.

Geekbench 6.6:
Multi-Core:
Air M5: 16995 Points
Lenovo Yoga Slim 7a 14AGP11: 9976 Points
The Air is 70 % faster.

Single-Core:
Air M5: 4195 Points
Lenovo Yoga Slim 7a 14AGP11: 2606 Points
The Air is 61 % faster.

Also, the Air has no fan, so you don't need to worry the fan stopping, etc. The following I haven't looked at, but since the Air has no fan, it may also be thinner.
The Air may also have better speakers.

Lenovo Yoga Slim 7a 14AGP11:

QuoteFlickering occurs at relatively low brightness settings, so extended use at this brightness setting or lower can cause eyestrain.

No wonder the MacBook Air occupies first place on Amazon's Best Sellers: notebookcheck.net/Apple-MacBook-Neo-shines-on-Amazon-becomes-second-best-selling-laptop-while-MacBook-Air-13-M5-occupies-first-place.1270602.0.html