That might be true for the bigger Surface versions but not for the Go. You can get a Go with the excellent backlit keyboard and trackpad for about half the money of the iPP 11“ with keyboard folio....
I take it with me in addition to my 12.9 iPP for the things I am not able to do with it because of the limitations Apple put on the iPads. If you are using the keyboard with trackpad or an additional mouse together with the Go it is very hard to go back to the iPad. A touchscreen together with a keyboard feels totally weird and uncomfortable...
You can get a non-pro iPad for less than the Surface Go, and yet the Surface Go is the slower of the two. It drags when trying to perform even the most basic computing tasks. Because of that lack of responsiveness, it's not good for quickly jotting down notes, or quickly doing anything. The battery life is terrible too.
The Surface Go does have an advantage though - it runs Windows. However, if you want to run Windows, it is so much better with keyboard and trackpad... so why not buy a more capable inexpensive windows laptop and get way more performance per dollar?
A few reviews confirm the speed (or lack thereof) the Go is capable of:
https://birchtree.me/blog/microsoft-surface-go-review-performance-where-art-thou/
https://www.laptopmag.com/articles/surface-go-benchmarks
https://mashable.com/review/microsoft-surface-go-review/?europe=true#y_TJEANfwOqP