I also agree with Phil very strongly. Assuming the mechanical engineering is accurate, a photograph's technical quality boils down to lens, film and developing. The artistic quality is down to something inside the photographer's head, and none of us are qualified to begin to understand that.
In a permissive role there are also factors that probably occupy 80% of forum discussions: how does the operation of the equipment impede or facilitate the production of a photo with optimal technical and artistic qualities? These things are less important than good engineering, which itself is less important than the eye for a 'good' photo, but making it easier is the icing on that cake - nice to have but not strictly necessary. So let's briefly talk about that icing.
We need it to work, and to work in a manner that doesn't get in our way. The F6 won't take photos better than any other camera using the same lens, but you might find it easier to take them if you can get on with the way it works. I'm definitely happier with proper (ie traditional) aperture and shutter speed controls, but even so I am more than willing to have a dial under my forefinger for aperture, and another under my thumb for shutter speed given the ease with which it gives results that please me - I am lucky enough to be an amateur who has no one else to please.
The upshot of this, for what it is worth, is that I now tend to neglect my other 35mm SLRs and even the film Leicas; using them is simply a treat for the experience, but not with an expectation I will make anything better. I can justify use of my MF and LF cameras on other grounds, and I'll add that the second place for ease of use among my collection has to be a Pentax 645n. Essentially, every time I use those other, neglected cameras it is for the tactile experience, and I enjoy that too. The F6, the 645n (and for that matter, the Pentax SF1/SFX for which I have a quirky but real soft spot) all get used in a way that reveals my age and experience. I use aperture priority and choose my DOF, then meter on whatever part of the subject looks right and then lock exposure, then I focus using the centre spot (or only spot in the case of two of them) and lock, recompose and shoot. It suits me, and is exactly the same process I use for a fully manual camera. Like all of you, I can make the same photograph with other cameras, but this method makes a compromise between user control, automation and convenience that works for me.
I hope Dante will enjoy his F4 and have lots of splendid pictures to share with us!