Original Theatrical Cut
Fully restored(including audio and vfx glitches and all) but a cleaned up negative.
Enhanced Cut
(Audio and vfx fixes like lightsabers and continuity fixes and removal of matte lines.
'97 Special Edition Cut
No FX Cut(with seamless branching to both '97, and Archival cuts)
Definitive Cut
The final vision from Lucas.
The Symphonic Cut Music Only utilizing alternative takes and cuts to tell the entire saga with no dialogue. Like a silent film.