I haven't seen a VRF in person, but the first thing I was blown away on is the quality of the hands on the ARF I got. To me, that 3D effect of the hands goes a VERY long way towards looking like well machined piece of jewelry vs a toy. Secondly, the bezel assembly feels great when rotating (to some people this might not matter, and understandably so. But to me, this is a difference maker of jewelry vs toy). Thirdly, the case on the ARF is awesome. Completely opposite to ARF's normally super boxy sub cases lol. In fact I love the case shape so much I wish I could just use it for a Sub franken. PLUS the case back is slimmer than VRF which goes a good way towards how it feels and sits on the wrist. Even the ARF xtal was pretty good.
I had bought all my parts for a franken before I even had the watch, but wondered if it was even worth frankening to be honest! Lol. But i did and I love it so I guess it was worth it.