Hello Henning,
Congratulation for your decision.
I am sure, your drive set will work first class also. The Pletti Advance is a great motor.
I think, the front of the Pegasus with his horizontal wooden frame is stronger then models with carbon structure in the front. The pictures show a similar frame at a Jupiter with back support
But in my mind, the noise-problem of many outrunners in knife edge, snaps or similar figures is not a question of the fuselage stiffness; it´s a problem of the motor design, because in such figures, there are a lot of gyroscopic forces. Therefore, a back support is needed sometime.
A large and heavy 2 blade prop make very big gyroscopic forces; it will be better with the new superlight 2 blade props.
And with light 3 blade props, you couldn´t hear an untypical motor noise in such figures. Therefore with a three blade prop, a back-support isn´t necessary often.
The Hatta special props works really good; very similar grip, nice noise and a good brake downside.
Unfortunately, the very wide 19x13 was too large for the Q 80 13XS ( approx. 90 Amps.); all Hatta props are designed for the Hacker Q 80 s or similar motors. Should work at your Pletti Advance.

The Addiction is still a great flying model! But it´s another generation.
Compare to the Pegasus, there are significant differences in all knife edge figures like loops, knife edge, rolling circles.
Moreover the Pegasus draw bigger in the air and looks smoother.

Bruno