The left plant (#1) was growing taller than the other, so I decided to even everything out with my ScrOG net. Everything looking good, and I'm enjoying tucking new branches and seeing all the lower growth developing!
I watched a video where a guy had 4 plants of different heights. He raised the pots of the 3 smaller plants, each by different amount, to create a level canopy. That might help you if your 4th plant is smaller.
good luck with it all, I'm a noob so cannot offer more than 3rd hand advice and best wishes.