OAM grip is 'grippy'and you get a swag of it - you wont use it all on a shorter board.
I am not arguing which is better, because it always boils down to personal preference.
But I would not call the other two we sell (PSH, CofL) 'slippery' (which is kind of how I got drawn into this)
What sets OAM apart IMO is the Arch bar running from the tail block.
You pay for this though - RR$220
We stock all 3 brands