In article .com,
...
The SD208 is fine if you are doing a groove (with the grain) or
plywood. If you are doing a dado (crosscut), go to a SD308. Almost no
info on this very very nice dado, but you can get it on Amazon or at a
professional supplier.

So is the situation this:

SD208 = rip/groove
SD308 = crosscut

or this

SD208 = rip/groove
SD308 = crosscut + rip/groove

Thanks,
Mike

--
http://www.mschaef.com