I don't think anyone is claiming that Watanabe is purely a reseller, he might be, but that's not what is being said. Some of us are saying that his Pro line gyutos and suji are so close to Toyama that if it is not made by Toyama someone is making an excellent copy of it, profile, grind, steel, even heat treat are same or so similar that they can be treated as same. Individual variations exist and seem to be one of the reasons why some people doubt, but individual variations also exist within Toyama line itself. Over many knives these 2 lines are very, very similar so it really doesn't matter if they are made by one person or multiple people building them to the same "spec". This is why some of us call them Watayoma, since it really doesn't matter which you get, just go by kanji, price, availability. In use there is no difference on average.
I have no experience with his single bevel. Also comparing knives today to same line 6 years ago doesn't mean anything since they change over time. For all we know they are now sourced from different maker or the maker just changed the line, Toyama did during this time. There is also a huge difference between claiming that the knife was fully made by a craftsman and claiming that it was sharpened by one.
In any case both are excellent regardless of who makes them and unless Watanabe writes on his website that he gets some of his knives from Toyama some people won't believe it. This is the beauty of the forums, we share information and everyone decides what they want to do with it.