the body width / length are the same... except for the neck pocket, trem and pickup routing... I think someone posted a pic in an older thread but I can verify this from owning a UV and 2 RG's [pre-AANJ]. Otherwise, the curves leading toward the neck is slightly different [due to the wider neck pocket]... here's a shot of my RG760 on top of a UV777GR:
the shot is angled but the UV's neck pocket is wider towards the high E string...
Reg