looked up kogetsu, looks like the only 2 santokus on the website are white #1 steel and a carbon steel one.Takamura, by
A mile1.6 kilometers. Either R2 or Chromax. I haven’t used Taka VG10 or any good Vg10 (Tanaka, Ryusen, etc) so I can’t comment one way or another on that.
I have nothing against Shun and Miyabi intrinsically but there are better knives available at any of the relevant price points once you know something about knives. Like Starbucks and coffee.
Takamura are, however, laser thin, less than 2mm spine thickness over the whole length. If that’s not your bag you might want to look at something else; if you want a thin blade like that but a heavier feeling knife try a Kogetsu. I just got one right before I had to switch from buying to selling a bunch of things I really didn’t want to; I’ve tried and let go a bunch of lasers but the Kogetsu I became immediately attached to and hope to be able to keep.