I love the Clean. I love both of them, but the Clean is my go-to Sub.
Both are bloody good reps and lightyears ahead of where we were 3-4 years ago.
I do see now that the Clean crystal is clearly not as clear as VSF when viewed at some angles in some light.
I think the Clean CGs are more accurate than the VSF.
The fit and feel is mostly the same, with the exception of the bezel action; the looseness of the Clean bezel is annoying. And it's a simple fix, so I have no idea why they don't make that improvement.
From all the VSF and Clean reps I have held, VSF appear to pay more attention to things like crown-tube threading and bracelet cleanliness. VSF have all been smoother and silent, whereas all Clean reps have been a bit gritty and squeaky. Again, easy things for us to improve with a simple clean (no pun indented), but I think CF is a little complacent in this area.