Vita gets janky pay-to-win 360 MMO port while iPhone gets a port of the game that revived the PSP in Japan.

Looks great but I'm not sure I'd want to go back to pre-Tri stuff.
I'm sure that's the only reason that you, a huge MonHan fan, isn't interested in this. 
Well, I'm sure Gen 2 is fun and playable since it's when MH caught on, but it's hard to go backwards when you hear things like how broken hitboxes and hipchecks were back then.
If I had an iOS device I'd definitely buy it, but it probably wouldn't get a whole lot of play.