Its worth it man. I have one and the only thing bad about it is that it neck-dives because of the sheer weight of the apparatus. Put good strings and maybe some pickup upgrades on it and its a great time.
I had the 6-string version of the black/purple catalyst you have and I think they are wonderful. I wanna find a four string version in the red but am having trouble finding it =[
I would say that they are both very different, obviously. The Fender jazz has a lot more of a flat growl but the Warwick has a growl like a bottomless chasm. It all depends on what you are going for. To each his own.