Push me pull you is an old issue

It all boils down to trying to get a clean exit of the accelerated air
Pusher wins THAT round but unfortunately looses a number of other battles.
Once upon time I tried cmpetition pattern designs made as pushers
and dual boom and rudders
It al worked very well BUT look ed awful in flight during rolls
also maneuvers designed ar ound tractor dsigns di not work very well -
The rudder needed to be in the accelerated airstream.
very stable -no torque reaction as th prop was ON the cg. (swept wings with proplocated at the root. which was also CG)
a very interesting project at the time
Pylon mounted engines are also amongst those setups used for tractor /pusher setups
Pylon setups are lousy at best because structuraly they weigh more and thrust lines really suck
But sometimes the overall compromise is worth it -in full scale.