From Wikipedia:

GripShift on PlayStation 3 is an enhanced version of the award winning PSP original, a title that has proved popular for its innovative mix of genres, burst gameplay and short load times.

Originally announced at the 2006 Sony Gamers Day Event in San Francisco, little was known about the PlayStation 3 download version of GripShift until close to its January 4th 2007 release on the platform. Priced at US$9.95, GripShift has been widely recognized for its value for money and sheer amount of content that it offers gamers.

GripShift for PlayStation 3 features many enhancements and gameplay adjustments over the PlayStation Portable version. The changes are significant enough that the PlayStation 3 version can not be considered a port of the PSP version.

These changes include the addition of track barriers to help players stay on the road. They are also incorporated back into the gameplay as another puzzle element that can both help and hinder your progress. The vehicle handling has been substantially reworked and now features increasing speeds as the player progresses from the beginner levels through to insane levels. The vehicle also handles differently off the road and depending on what surface it is on. For example it will now slide when on ice.

New environments have been added to compliment the new HD graphical presentation which includes dynamic shadows and other new lighting and texture effects.