Quoted from Bendit:
I own lah. Would jp be too similar when put side by side?
I had both at the same time and they have similar elements, such as the Smart Missile. I don't think they're too similar, but I'd rather have JP over LAH if you're just looking for one 90's Data East game. If you find they're too similar you could always move on from LAH unless that's a keeper for you. Unloading JP wouldn't be too difficult either, in that case.