I think the biggest improvement is in your understanding of good texturing techniques. Just keep thinking structure, localization (big shapes) and eye rest, and you'll have a stellar piece on your hands. My one crit is to really keep an eye on that specular, and to keep pushing it so the materials feel right. Keep it up!!
Yeah I am noticing a little color on it now but it could definitely be pushed further. I was imagining the light parts in my paint over as the actual metal color my reason for highlighting those was to create contrast in the character for purely aesthetic reasons not practical, tint it with whatever color you like whatever…