I heard SFMC say something about this a couple of times, but Im not sure what kind of program it is. Is it like Photoshop or is it better?
They both have some similarities. Photoshop is for more than just drawing, it has lots of tools for photo-adjusting, color curves, and other features that professional printers need. Painter focuses on being an art tool, it provides very realistic simulations of watercolors, pastels, and any other traditional media that you can imagine.
So they both have their uses, I wouldn’t say either one is really better than the other, it just depends what you want to do with it. Good work happens when you have skill and practice, not with what software you own.