On left one I tried to achieve somewhat Megaman-like leg design with those helmets. I'm not completely happy with it, as the angle is quite odd, but I still like the shape of the helmet part . The upper torso is rather basic stuff with the always-so-useful 1x1 SNOT brick with five studs.
The right one is basic Zeessi-style suit. It is somewhat based on my old Dieselpunk Suit's frame. The main idea was to use that windscreen dish as a shield. As the Boba Fett helmet/jetpack (only Boba part I own) came in, I added some green to mach. I think the color scheme has quite a good forest camouflage pattern.