Niu Niu Variation

I've come across a lot of variation in the game Niu Niu which I would like to document.

Here are my sources for the game, all of which diverge from each other.

Ha Tien Vegas provides a short description but says you automatically lose if you cannot make a hand with 0, I feel like this might not be true, this is the least detailed source which I trust the least.

TCSJohnHuxley's "Niu-Niu Xtreme" seems to have a fold mechanic, making it pretty different from the others. I don't know if this is played anywhere.

The other sources I have are more normal:
QueenCo, Hoiana, Xamat, Solaire, and City of Dreams

First let's talk about hands ranked above Niu Niu
5 Pictures (Ultimate Niu Niu), 4 of a Kind, and above all 5 Small Niu Niu (unsure what this means) rank above Niu Niu in QueenCo
Ultimate Niu Niu and Hoiana Niu Niu (4 of a Kind) rank above Niu Niu in Hoiana
Xamat doesn't seem to have a higher hand
Solaire has an Ultimate Niu Niu above Niu Niu
City of Dreams seems to just have 4 of a Kind above Niu Niu (no mention of Ultimate Niu Niu)

Next we can discuss the commission on the Equal Bet:
QueenCo: 5% commission on Niu 7 - Niu 9 wins
Xamat: 1:2 payment on winning Niu 5
Hoiana, Solaire, and City of Dreams: 1:2 payment on winning Niu 6 (2.25% house edge)

For the Double bet:
Everywhere does 5% commission on wins 2+:1, except for Xamat who does 1:2 on winning Niu 5

For the Super bet:
Everywhere does 5% commission on wins 2+:1, except for Xamat who does 5:2 on winning Niu 5

Just thought I should document this for ludology purposes =)
Does anyone know of other rulesets?