I have a Yoshikane 270 SLD and a Blazen 270 in SG2. In my experience, the SLD is easier to sharpen and holds and edge much better. SG2 takes more effort to get sharp and doesn't stay sharp long at all. The edge degrades quickly, but once settled it stays there for a long time. The grind on the Yoshikane is also much thinner BTE so it cuts better. I've been thinning the Blazen a lot, but it's still got a long way to go.
Also consider it's more about what the maker does with the steel than the steel itself.
Despite the lack of edge retention, the Blazen is a REALLY nice knife. IMO it doesn't get enough love.