There are many differences but none that can be written on this forum
, how about we get back on topic.
From my experience, yes I have only piloted in a Piper Warrior, flying in any plane is the same, its flying just some make it easier than others.
It really depends what you are interested in, if you are interested in mechanics of cars such as the engine etc then a mechanic is probably the way to go. If you are a machine operator and enjoy that type of job then flight engineer and if you enjoy the freedom that the air provides the pilot is probably for you. But having said that if you are in GA you probably can all three.