Hyperdimension Neptunia Rebirth sexed up from the PS3 to the Vita

Okay, not that sexed up, but certainly prettied up a bit, with its bubbly girls and bubblier soundtrack. This new video compares the PS3 to the Vita edition of Compile Heart's action RPG and it does look a little cleaner. But, is this the sort of game that needs all that work? Surely just shovelling it over and concentrating on an older game that could really do with the work would see more sales and benefit.

UPDATE: Note that Hyperdimension Neptunia ReBirth 2 is also coming to the Vita, I guess some time after they get the first remake out the door.