Lemme throw forth the corectitude!
The phase 1 in dark forces: skinny skeleton with shield and sword, similar to the Mquarie concept stormtrooper
Phase 2 in dark forces, a little beefier, and looked more like a stormtrooper on steroids.
Phase 3, big *** droid/exo-power suit, seen once in the game, being worn by Rom Mohc.
For the battlefront DT, its actually a cross between a phase 2 and 3, clone and stormtrooper.
The similiarties are:
Helmet face is just like phase 2,
helmet swoop is also on phase 3
Jet Pack is very similar in shape as phase 3
Backplate without Jet Pack is TK
Ab plate is clone,
chest is custom, shoulders, forearms and biceps, shins, all custom
Belt is a clone, but with only the 2 front boxes and then thermal detonator canister on the back.
Cod/butt is clone, thighs are clone
Handplats are a custom/ROTJ TK handplates
Blaster, is an E-11 "arc caster," and a scout pistol side arm
Oh and thats a pic of the phase 3