Bolt patterns on the 8V are like the Samurai - and things will swap between them (intake / exhaust etc). The 16V head is a totally different bolt pattern & won't share intake / exhaust header. You keep generically referring to "exhaust", so I'm not sure which part you're trying to replace. From the header back, you could probably make it work. The 16V will have an extra o2 sensor, leave it in (to plug the hole), but otherwise ignore it.
Lots of other stuff will bolt between the two (diffs, axles, some body panels, hood...), and a bunch of stuff won't (even less will if it's '96+, as Suzuki did some design changes between OBDI and OBDII, had to engineer in air bags etc).