So I did a twins batch of SMaSH and used two different yeasts. FIgured I'd share the results here.
The yorkshire yeast cake knocked it down from 1.060 to 1.008
The s-04 took it down to 1.012
The yorkshire cake added a LOT of yeast flavor and esthers fermenting around 66F ambient. The S-04 is pretty damn clean and surprisingly enough, at this time (may be the yorkshire is just too young) I'm really enjoying the S-04 more. Fairly clean, nice little body and the flavors of the maris and EKG are much more clear and delightful. I'll be sure to post back if anything changes in a week or two.