The difference is your lifts could have been done in your gym, when you are comfortable, in your routine, with your favourite bar, your friends spotting, your favourite music on. At a meet you lift at a strange time of day, after making weight. You lift when someone else tells you. You warm-up with a bunch of other people who may or may not help you. You lift to the commands of impartial judges and to the rules of a federation. You unrack and rack the bar when they tell you. You pause as long as they tell you on the bench press and regardless of whether you complete the lift, it is only good if the judges say so.
It is NOT the same.
Having said that with your gym lifts at your bodyweight, you would win most local and possibly state competitions. Not sure what else you're waiting for in order to be ready?!?!