I’ve tried a few different mazaki. He definitely goes further with the blue than white at least with the one I have. The spine and choil are so smooth it’s ridiculous, the kanji is beautiful, etc. Although one of the gyutos I also kept wad a kuro white 240 from yoshihiro about a year ago. Very similar to the ones carbon has now. Grind is extremely thin behind the edge. The taper is insane. Fit and finish on that is nice also. Think the only thing I would say about the blue gyuto is that the finish on the bevel is kind of meh. Besides that, I think there is definitely more work and effort put into the blue gyutos. As real comparison like that though would be tricky because there are a lot of different retailers out there and although mazaki has gotten some kind of consistency down, his knives tend to vary depending on the retailer.