[s-cars] #8 or #6 Turbine for K26/TO4E Garrett Hybrid

[Cody Payne]

Gents regardless if I go w/ a 50 or 46 degree Cold-Side...I wanted to know if there are any real-world "disadvantages" to a smaller K26 Hot-Side Turbine i.e-#6 vs. #8.  Ray Tomlinson is installing a TO4E 50/K26#8 as we speak. (Good Luck Ray...drink lots of beer!)

Since I received Corky Bell's book ultimate boost he states:
"Selection of the turbine must focus on the principles of spinning the turbine fast enough to produce the desired response and boost pressures yet keeping back pressure to an absolute minimum."

Smaller Hot-Side Turbine=Increased Back Pressures but increased response of turbo.

Thus question is if the #8 is too big vs. #6?  Any experiences here either way?

Cheers

cp