I contacted B.J. Park about the performance of the Etude. This is his reply.
Hello Rudy,
Thank you for your interest in Etude,
Fuselage is the same as Nuance, but main wing, stab and rudder are different from those of Nuance.
The purpose of the change is to make its tracking performance the same as G2's.
Performance of Etude is the same as G2's except the perormance influenced by canalizer.
Knife edge loop can't be made smaller than G2 canalizer type makes. G2 easily makes smaller knifeedge loop than full up elevator loop.
So all classes do not need the above smaller knifeedge loop can use Etude.
Best regards,
B.J. Park.