SWB-Track/Vit chassis are identical to Vit/SWB-Tracks.
LWB-Track/GV chassis are identical to GV/LWB-Tracks.
Track/Kick chassis are identical to Kick/Tracks, excluding the Vitara (damn, this is difficult...) Sidekick Sport.
There's a possibility of very minor differences if you compare two that were built in different factories or in different years (as long as they're the same generation), but, as a rule, don't sweat it.
Hell, everything from an '02 XL-7, built in Japan, bolted onto my '03 Tracker, built in Canada, even though the XL-7s frame is wider at the back. Well, excluding the trailer hitch, obviously.