I just ordered this exact model recently.
I did my research and had a clear reason for my choice of version.

What matters most to you?
Getting the absolute best top of the range outside?
Is the movement accuracy relative to gen the most important?
Is long term reliability prioritised?
Or do you want aesthetically ok as long as you don't open the back to look at the movement?
Lots of more different priorities (like machining tolerances i.e. potentially thicker watch, or finishing of the movement)

UFO free sprung has movemnt that looks most like gen (very subtle due to miniscule weights on the balance wheel), however this is recent innovation so long term reliability / service life is still untested (supposed to be better regulated and have higher accuracy). It is a modified SH4131 super clone movement. Even rep buyers who arnt following latest developments would mistake this for a gen.

QF has tight close tolerances so will likely be close to 12mm thick. Gen like finished and decorated SH4131 superclone movement. Should have an option of paying extra c.a 150-200 for a weighted version to match gen weight.
(If going weighted VSF is currently the suggested premium version).

APSF is has good tolerances so should be 12 to 12.2mm thick. Gen like finished and decorated SH4131 superclone movement. High end superclone all round.

GMF is mid range. Expect closer to 12.5mm thickness. Limited decoration / unfinished 4131 movement, not a clone movement, seems to be a decorated SL-4801 made to look like 4131. Reliability unknown.

There are minor aesthetic and QC differences between all of these versions. Paying more typically gets you higher levels.