Rai,
I have a JP Pro next to the TSPP you sold me (still awesome btw) and there was a Deadpool LE I put a few hundred games on in the company office last year. I would tell you that it honestly depends on your skill level. You talked about Deadpool being the first few badguys over and over, but Jurassic Park can be the same way. JP gets lots of love, and so does Iron Maiden, but that love comes from the depth the game has if you are a decent player. JP can be the same few control panel missions, raptor multiball, and first few dinosaurs over and over if you never make it to the main control room missions much less escape. I would tell you this. If you made it to Alien Invasion in TSPP, and especially if you do so regularly (a low bar for some, higher for others like me) you would be better suited to the Elwin Games of Maiden and JP. If you never made it to Alien Invasion, I would think Deadpool is the better choice. I've beaten Deadpool but have never made it past 4 dino's in JP.
I'll make it to Alien Invasion someday. Just because I have it in my basement and try every day doesn't mean I'm bad...