Here's the deal...World Heroes is a very underated series, everyone is always labeling it as a clone and what have you, it is a clone but so is the fucking rest, anyway back on topic...if you really liked WH2 which is a great game, some consider it the best, then you're prolly gonna love Jet. I love WH when it came out, (Confession Time: It was easier to play than SF and it had no lines so I actually learned how to play fighting games with WH) then when WH2 came out on the SNES I had a ball, excellent port, in some ways it's even more fun than the real thing. Now moving unto WH2J, oh man this game is awesome, so the Death Matches are gone but now you have the whole "Team Theme", I'm guessing 'cause KOF was hot and SNK wanted to spread the KOFness everywhere...that's my story and I'm sticking to it...so you're alone against teams of three, pretty fucking awesome. Then top that with some tweaks and a new Boss but lt's not forget the best part which was way ahead of its time. Clashing, clashing is the one feature that you won't find in any other WH game nor any other Neo hand to hand fighting game and the feature it's a big part of the game, specially when 2 players know how to exploit it.
My suggestion, try it out via emulation and go from there, mind as well check World Heroes Perfect while you're at it, you won't regret it.