All of the gassers need a pipe setup for broad band running.
The ZDZ40 is easily the strongest of any of these but setup wrongly is shaky at low rpm - the new engine has a completely different timing curve. can't say anything more .
The Evolution 26 on my foavorite pipe is really good on Skorepa 18x8 for patterny stuff.
but for max power run it 9000 on the ground and then just use power as needed in th air.
weight - do not exceed 11 lbs
The RCS - you must pipe it also- and it runs well also the Roto runs extremely well and smooth but not quite the poop of the Evolution/ MVVS
Why the ZDZ "did not compare" with the glow is a mystery to me .
I fly a ZDZ40 RE with a simple JMB can - turns a Mejzlic 21x8 easily at 7200 and very quiet and smooth but not as quiet as th long cfpipesetup and larger pipe .
On my 13.25 Extra 260 H9 it will do anything any pattern setup will do extremely easily
FWIW the Showtime and the 26 Evolution is all any one could want for a good pattern practice model.