>>6499086Colors (particularly the green) are much more violently saturated on Rebuild. The distinct soft lavender of the jaw and pecs are usually portrayed as either cool grey or steely blue in Rebuild. Rebuild is hunched over and is much leaner and lankier. Rebuild's abs now have one green section. There are also proportional changes all over, like the jaw getting longer, head getting larger, etc.
Proportions are a bit of a moot point though because animation is fluid and proportions can change from scene to scene. Rebuild is generally skinnier though, and that green midsection piece is probably the easiest way to pick it out.