Pretty fun bike game.
I have both the Vita and the PS3 versions and the main difference is that the PS3 has some background stuff going on that the Vita doesn't . It's not a big loss. The controls of the bike, the jumps, none of that's really different.
Another difference is that the Vita lets you take your picture and should you get a track high score, that picture gets posted, unlike the PS3 version which uses your PS3 profile picture.
Some folks might say this is nothing but a rip off of Trials HD and Trials Evolution for the Xbox 360 but who cares, those games aren't available for the PS3 and Vita and why should Sony fans be denied such a fun type of game. And for the record, there was a similar game for the Gameboy Color in 1999 called Evil Knievel with similar type gameplay, long before the Tirals games.
If you like this sort of game, don't hesitate.