Once again, this is from the North American perspective... If I have misunderstood the teminology, I apologise.
As an former owner of both body styles ('93 Suzuki Sidekick LWB/4-door and a '96 Tracker SWB/2-door G16 engines), I would say "They take the same tow bar/trailer hitch assembly". I actually installed a bolt-on unit on the '96.
Things get weird with what we call the '96-'98 Sidekick Sport (Vitara) with the 1.8l I4 engine. It has a wider-spaced frame.
An examination of this webpage indicates that they are interchangeable:
http://www.etrailer.com/hitch-1994_Suzuki_Sidekick.htmI hope that this helps!