I've played such a PKO HU few times before.
It's quite intense since you'll come across so many different type of players within seconds. Basically you can't take any notes since you'll come across the same players in like every 20-30
hands. Hard to remember anything. 😅
I think it's easier to
bluff/get bluffed there and I think it's in general much more aggressive.
Hope that helps, but probably not. 😛