I will preface this by saying that, to my knowledge, most if not all of the Shirogorov models I have handled have been from more recent generations, though my 95T is not the newest generation, and I believe i have only had one from the most recent run.
I have handled both the bearings and the washers, and for what my experience is worth, I very much like both. My 95T on bearings get used almost everyday, and I have enjoyed it every second. The bearings will tend to "fly out" faster, but that has never been a huge topic to me honestly.
Once broken in, both will flip extremely well in my experience, and the washers can get even smoother than the bearings, as long as you actually let the knife break in all the way.
I will say that the washers are slightly easier to take care of. Because Shirogorov uses a free-spinning ivot in some models (depends on the generation), it is very hard to dissasemble the knife unless you have proper tools for it, and the bearings can get some dust and grime build-up over time. Unlikely to ever really fould up the knife, but you will feel it in the action sometimes. The common method of fixing this is sonic cleaning with a non-corrosive fluid, as it doesn't ever require taking the knife apart, but most people won't ever have access to a sonic cleaner.
The washers have basically no space for any of that grime and dirt to get in between the interface surfaces. Because of this, the only build-up you might see is going to be around the edge of the washer, which is much easier to clean.
I think that honestly it's a matter of preferance, but I like both. I originally sold all of my Shirogorovs except for my 95T on bearings, but I now have a Hati on washers because I really do like both of them, and both have their inherent appeals to me.
They also have their new Roller Bearings, both in Single-Row (SRRB), and in Multi-Row (MRRB), which I have heard are absolutely sublime, though at the moment I have not seen them in anything that wasn't in the Custom Division. Haven't handled them myself, but you can bet that one of the MRRB Custom Division models is definitely on my all-time grail list.