Maybe. I feel it's a negligible difference, but he does need to remove metal to polish the High Grades, so you are right, it would change the geometry (in a minute way). Like you said, it may not be better, or bad, just different.
ps I'm glad you kept the handle on. For now.
I have a few Carter funayukis and combined they are certainly the most used ones. The SFGZ ones are more robust and great all purpose knives IMHO, the HG is thinner and I have the most fun when using it for thinner, more precise cuts.
Even though the CKTG Carter's I received had the Carter characteristics there was something about them that was off. (besides the poor finish)
The Carter that I got during his last sale has quickly become one of my favorites, but I will also say that when I pick up my nakiri, it almost always wins out in the fun department. I really use it a lot when I start making soups in the fall. I've also been using the sheep's foot parer Pierre made. I find myself peeling things a lot more and using it as a chopper just to see what it can do.
"What happened to those other underpants you had?" -- Flight of the Conchords
150 petty, or 210 gyuto