I agree with Greg. There is a lot to a multiblade. Fit, action, and finish are trikier on these knives than they are on most other types of folders and there is less room for minor adjustments to make those three aspects come together. I think Bose, Shadley and Davis are still the best because it is difficult to see how they could improve upon those aspects. When you think about it the maker is dealing with up to 4 bolsters and at times several blades and springs to tension them. The actions on all the blades have to be crisp and they have to nest evenly in a small channel. That is a lot more to consider than a single blade in 1 channel with two bolsters.
My thought is that the slight separation on the knives made by Tony is the action of the blade. I also see guys like Richard Rogers, Baily Bradshaw, Joel Chamblin and others as being hairline close to that level. To find the differences you have to get to a pretty nit-picky level and you have to look at several since by the nature of the beast even like models made by the same maker are going to have minor differences in the aspects of fit, finish and blade action (especially blade action).
In other words, I do not think every knife made by so and so is going to be better than the same model made by someone else (In all honesty the most perfect multiblade that I own was made by Eugene), but I do think that in general they do not come better than the ones Tony makes. That does not mean Tony's knives are the only ones I buy. I get just as much enjoyment from the knives of Dan's, Bill's, Joel's, Richard's, Bailey's, Tony's, Terry's, Art's, Eugene's and others. A few are pretty good friends too and that just makes them even more special to me.