Ninja Gaiden Sigma + thread

With Playstation Vita coming out early next year one of launch titles is Ninja Gaiden sigma +.

Hears a trailer and gameplay video's

What differences between this and the original?
Any new content etc?

Some of elemnts of NG3 will be in Sigma + like hero mode. I don't know the rest of the NG3 mechanics that will be in this game. Other differences are brand new costumes the controles on the PS Vita like using the touch screen to charge up your ninpo attacks. Their some brand new missions you can do in mission mode. The last differance will be the graphics. Also Ninja Gaiden Sigma + will come out the same day as the PS Vita.