The back right is different, as in there will be a gap at the back right between the carpet and the console but its only cosmetic. The attach points are all still good and you'll never see it.
See how it humps up there? That's where the gap will be but like I said, YOU will never see it and its well worth it for the far superior 01-04 console. Unless the 99/00 cars have that same hump in the floor pan but I'm almost positive it started in 01, not 99. I know for damn sure my 98 will have that gap. That reminds me, I need to get off my *** and dye that console and install it.