Im quessing that some omniframes, depending on gear setup, will be much smaller/lighter and more agile (maybe some fastmoving sniper build for onmiframe). The one that is on picture is avg looking OF (or how devs imagine it).
I think the idea behind the omniframe is that you can fit what you want to it (within some sort of reason) so you could have a heavily armoured sniper that can't move v fast or low powered abilities but hey, that's one of your builds. I think that's the concept, anyway...
