For lugged steel frames. The difference is in the filing. The amount of it, and the shaping and proportions. It really does not matter if a frame is built by a single man or a production shop. Both are usually capable of fine work if that is the desired outcome, and both can (will) cut corners if that is what's called for. And there's always "good days and bad days".

Too many people do not see past names and legends, you need to look at the work.