
The program difference has been studied numerous times and it is always the same answer, the growth in the gym is eating, sleeping, and training with intensity. It doesnt matter if you do Arnold, PPL, Bro Split, Upper+Lower. The point is, recovery. Growth happens outside the gym. Dorian Yates talks about it. A lot of people find 4 days are good for them, some are 5 days, some are 3 days. Do whats comfortable for yourself, train with intensity, eat your macros, and sleep.
Oh you do full body split? It’s gonna take a little longer to put on actual muscle but that’s a lot more athletic way to build muscle if you get what im saying, if you want to just straight up build muscle like a bodybuilder I recommend starting with a PPL split and change where u think ur body needs to from there