Pusher

Pros	Cons
Less airframe drag, clear airflow over airframe	Disturbed airflow at propellor due to interference with airframe structures, less propellor efficiency
	Less engine cooling
	Less ease of accessibility for repairs
	Consider prop clearance when landing. Main landing gear hits the ground first

Notes:

Payload will be mounted at the front of the aircraft making it more nose heavy. Aircraft should be airworthy without payload. Placement of motor matters, more analysis needed

Puller/Tractor

Pros	Cons
Best propellor efficiency, clean airflow at propellor	More airframe drag, disturbed/turbulent airflow over airframe
Better engine cooling as undisturbed air flows directly to the engine
Better accessibility for repair

Sources

https://forum.flitetest.com/index.php?threads/pusher-vs-puller-propellers.29559

https://www.youtube.com/watch?v=ZmIW4fTNVwg