I don't know what the requirements are at BetFury, but at stake it's very simple:
Level 1 = full name, country, date of birth, residential address, city and postal code
Level 2 = upload national ID Front side and Back side
It's not a difficult task, currently all stake users are required to do this simple kyc
Those are the same requirements at BetFury.
The main difference is that now KYC is mandatory at Stake, players wont be able to play without KYC at Stake while at Betfury, players are still able to play(deposit/withdraw) without KYC. About the requirements, I believe most KYC are the same (for the basic) which is about uploading personal document such as ID card or passport.
I don't know where you see the difference. I asked about it explicitly in the chat and you can't bet a single satoshi without having filled in your data level 1 KYC on BetFury. What you can play before are the free spins, but nothing else. I see the KYC requirements the same on both sites.