For anyone who doesn't know, Elite was an Xbox version of the original Operation Flashpoint. (Later Arma Cold War Assault)
While often mistaken for a port, it's actually a remake on an early version of the Armed Assault Engine, (So Armed Assault features like leaning and the little coloured circles over friendlies/enemies are in it.) this also means alot of the models and voice acting were completely re-done, it also uses animations more like Armed Assault compared to the PC original.)
In addition, unlike the PC original, Post Launch Content was actually put into a modified version of the Cold War Assault/Crisis Campaign, (So you can find hand guns and later added vehicles like the Chinook and Bradley in the original Campaign.) a version of Resistance was also included but I'm unaware of any big changes.
While obscure and only playable on original Xbox/Emulators, it is actually signifficantly different from the original and this is just all I've managed to gleam from a few recently uploaded videos of the port. (since I've not played it myself yet.)
Should we make a page detailing all the changes? (And hopefully anyone who still has/remembers playing the port could help edit it.)