I don't know how big this place is, but I'd probably end up playing both games. (they allow surrender, by the way?)
Even though you could spread $10-$200 on the 8D tables, you'd want to wong on them.
Spreading $25-$200 on the 6D tables would be sub-optimal, and not recommended in a play-all environment (unless you're getting comped well, and as green chip all the type that might be a factor) I agree that wonging out is going to be important at these 6D tables.
You could wong back and forth, start playing 6D off the top, wong out, go find a 8D table to backcount, wong in, wong out, go back to a 6D table with a fresh shuffle, etc. It's really going to depend on the layout of the joint, and how many tables are available. If it's just a few tables, you'll be looking at short sessions.
Also, I have some well-documented problems switching between 6D and 8D problems with KO. Actually, it's not the adjustment to KO itself, it's recognizing how many decks I'm playing when I sit at the table