Yep. Identical. With the right spacer or the GTI's wheels, I believe I could bolt them right to the Passat. Matter of fact, I may be able to swap the B5 Tyrolsport front caliper bushings onto the GTI. (the brass ones that replace the rubber)
Maybe even the rear brakes could swap too, though that would probably mean transplanting the wheel carriers too onto the Passat's rear arms. It's both scary and reassuring to see so many similarities!