I'll try to explain the difference, my english may be a little too basic for this but I'll try.
A personal trainer is a person who designs a workout for you (like really designs). They accompany you in the gym, they make sure you do the exercises correctly, they set the weight you must lift, etc... Most of them also design a meal plan for you. And, YOU are the one who pays them to do it.
The other guys, first of all, are payed by the gym, not you. They wander around the gym pretending to do something, but mostly they're just checking on the girls. If you ask them to do a workout for you, they'll just do a worksheet with some generic shit; If you are a woman, prepare to only have abs and legs in your program. They do not accompany you and make sure you do it alright, because they have to check a lot of other people and they are too busy doin nothing. They do not give a shit about your nutrition, at best they try to sell you some of the junk the gym has, like that horrible protein bars with a lot of fat and sugar
I'm hope this clears it out. I'm from Europe btw.
