I assume you are talking about what Apple is giving away to .Mac customers? Well, it's not a replacement of iPhoto. iPhotot is first and foremost a place to orgtanize and stroe you digital photos where photostuido is more of a program for digitial manipulation of your pictures. I store all my photos in iPhoto but manuipulate them in PhotoStudio. It's kinda like a dumbed down version of Photoshop I guess.