Oh those are real friggin clean, love it. I'm guessing from that sharp blue you've done some space marines at some point? I'm still somewhat new to all these hard metal lines myself, I can speed paint orcs pretty good but I can't make my mechs look that sharp
A lot of really clean little details on the blue mech. Attention to shading the shoulder weapon and the slight black on the edges of the cockpit canopy to really give it shape. Really solid stuff.