No, sorry, I have no personal interest in buying the G635 or 935, as I implied in my original article. I buy almost every headset I review with my own money. You can see my reviews policy here:

https://xander51.medium.com/my-official-reviews-editorial-and-monetization-policy-ce903308bce4

Countless other folks have tested the mics on this generation of headsets, though, but I agree 635 vs 633 comparisons aren't super common. Most of the big YouTubers were sent the G935 and many of them gave it mediocre reviews. As far as the G635 goes, the reliable Rtings.com did do a full test including their usual mic samples.

https://www.rtings.com/headphones/reviews/logitech/g635-gaming-headset

They thought the mic was a little bit on the tinny side . Hope that helps you out!