Valence and grilles are different between the model years- different grilles and headlights in 93+.
Upper hatches are interchangeable, however, later model have a different third brake light. Otherwise, body parts are interchangeable, with minor differences in cladding and flares.
Hoods, doors, bodies are all interchangeable, all model years, and all models.
There are minor differences in various cladding and stick-on options in models, but generally, interchangeable. VRX models for instance have door cladding on the bottom third of the door that are removable, they're held on with double sided tape. Same doors as US spec
Lexus parts are interchangeable, however, they had more cladding too, and more holes for the cladding mounts, in fenders and doors. Can be swapped and holes filled in, for non-LX models.
Panels are interchangeable, however, wiring and electronics are more model year specific. If you swap doors or panels, keep the original internal parts, so you can use them. You can splice newer harnesses, however, it's easier to swap older internals into newer panels.
I've parted several rigs of various model years, and have a whole collection of parts from newer model year rigs with plugs or slight differences to parts that make them a pain to swap- I could splice harnesses or rewire parts to work, if needed. Keep in mind, I've parted three from 91 & 92, and 2 from 95+. The newer internals can be made to work, just requires more work.