MF01S: Black body, SST20 @ 5000K D4V2: Titanium body, SST20 @ 4000K F3WA Titanium body, XP-L Hi @ 5000K S10: Black body. Bought it because it was on significant sale. I already have a bunch of Olights, including S1 and S10R. I already have a D4 titanium with a Nichia 2019. Its a bit of a mess to get the Olight limited editions here and I really dislike the bright "moonlight" modes of most of the big companies. Otherwise I would've picked up the red Olight.