Unfortunately, I am not able to see the images posted, since those are only available to Subscribers. However, I do think there might be a big difference between Velvia 100 and Velvia 100F; or at least the implied message I am finding is indicating that. I have not used Velvia 100 in Quickloads, only in 35mm and as 120 roll films. I have used 100F in all the formats I shoot. I generally found Velvia 100 to have better green performance than 100F, though the bluer shadows seemed to still be there; very generally, I agree with the comments about a cleaner look to Velvia 100. I have been underwhelmed by Velvia 100F.
As for processing, I tend to use the same places, and I go by their consistency. The film rebate areas are consistent. Whether they are consistently wrong could be another matter, though if the results for me are always consistent, then I know what to expect. We could expect all Fuji, or all Kodak, transparency films to work in very similar ways from one batch of film to another, though anyone who has gone through lots of boxes/rolls of film realizes that there is a certain level of variation. This is why I put the comment generally when I describe characteristics of these films.
With so many films available, I tend to choose them based upon subject matter, or intended scenes. If I am photographing italian sports cars, I tend to go for E100VS. When I photographed an old Morgan Plus 4, which was BRG, I based my decision off a test of E100G and Velvia 100, and chose E100G. On some old Porsche race cars, with a particular blue to them, I chose Velvia 100. These are very specific examples, with the generalization that Fuji choices work better for blue to green (cool) tones, while Kodak choices work better with red and yellow (warm) tones.
People who shoot lots of landscapes tend to want more of the blue or green performance. I rarely have ever done any landscapes, and even more rarely desert scenes. You would be better asking the opinions of others on choices of films. Part of film choices is a discovery of what matches your own personal vision and expectations. I am just glad we still have so many great choices.
Ciao!
Gordon