There will probably be some differences mate, but you should be able to use some of it at least.
The civic has a smaller bay ? So the loom is probably a different length. It also has some different sensors maybe ? Also light wiring ? Ive not had one out to be sure, but it could either bay a complete engine bay harness, so lights, engine, washers, fuse box, everything under there basically. Or it could be an engine loom, which only has wiring that goes back to the ecu.
Either way, you will be able to splice stuff in. What are you looking to do, a tuck or something ? Give me a shout if you need any help, Im a diagnostic tech, I pretty much live in electric / wiring