I've flown OZ 321s several times imn business on short hops between ICN and Japan and, while the service is nice, the seats are nothing special. Lounge access in ICN is a plus, but if you're *G, you get that anyway.

I noticed that KE has a 747 leaving 20 minutes after the OZ 321 flight. That would be my pick (and I'd probably use 30k DL miles to make it happen).