You are going to love what you can help a plant to do. Follow the quadlining link in my signature and have a look at what people are doing.
You’ve already topped one, I see it has three good pairs of branches about to start. You’re already running this as a comparison, so for interest sake you could train out those six branches as they grow and you will have a canopy full of colas.
So long as you are growing photo period, not autoflowers, and you can spend an extra week in veg it can really add serious weight.
I’m almost at harvest on my first ever indoor grow. I have 3 plants in a 3’ by 3’ space, they are 3’ tall and touching every wall, with not just 3 but a whole bunch of tops.