been trying to get some info from a few of the companies to help me choose but it is like trying to get blood out of a stone
What do you want to know? I've used all the bats you've mentioned in the title, so can give you a view on all of them.
There is no difference (realistically) between the RDX, Jester and Joker. They are both more or less the same size (roughly harrow blade with extra long handle) and have loads of wood so an exaggerated hitting area that the ball flies off. They both result in the bowler bowling short at you when they realise that you have a non-standard blade, but I didn't find that an issue. It's the leave or hit mentality.
The H4L 666 Monster is a full size blade and Matt makes some great bats. This is one of them. It functions as I would expect a bat to. For the same weight as the harrow bladed bats, there is less wood behind the middle, but that's what you'd expect with a standard blade length and width. The ball flies off these bats as well, but the edges and toe aren't as "powerful" as there is less wood there due to the extra width and length.
The SpiriT20 is a halfway house between the two with a shorter blade but standard width. It also has a lot of wood behind the middle, is very forgiving and I have comfortably hit a couple of massive sixes with it.
Realistically, your question appears to be "T20 style bat or standard style bat?" The answer would be what type of cricket do you play most, what sort of batsman are you and what type of shots do you play the most, then I would be basing it on that.
Or buy the halfway house, which is the Bulldog SpiriT20 if you really can't decide. You won't be disappointed whichever way you go.