Great review!

I think the 35 sound better. But their clips are much worse. x_x Sure, these are very cheap, but ultimately not good enough sound to be worth wasting money on, IMO. I never really used my 75/35/40 in place of any of my other gear, due to how poor the sound is. I would aim for a used M40x, HD560, or Legacy 3 on eBay instead.

Also - Yaxi pads!

I own multiple pairs of these. I use them for exercising or any time I want a lightweight headphone with good quality.
These are certainly of good quality. I don't mind the ear clips, I got used to them after a few wearings.
For the $20 price range, no other headsets I've heard come close.

@UmustBKidn Which other $20 range headphones have you tried? I got a HyperX Cloud 2 for $35 on Ebay, pretty solid sound.

@Jarlaxle have you heard KTXPro1 by any chance? I like them slightly better.

@povidlo unfortunately no, but they have the same titanium coated driver or so I heard. Headband is pretty similar to kph30i so I think any improvement in sound can be attributed to increased clamp force. If I get the chance I would love to try them and maybe even ditch my ksc75s