Yeah, a split usually means you do lots of isolation exercises, and while you get high volume, you don't get a lot of intensity in your workouts. Full body lifts, especially with the big three, allow you to lift much heavier and get more out of it, just make sure your form is correct.

By the way, only because you said '3 curls then 3 bench', even in a full body routine, you ideally want to place the heaviest movements first... so probably 'deadlift, bench, military press' or whatever. Just a quick note.

Good luck