Does topping really affect single cola phenos/strains?
From my experience, the shorter the pot, the shorter the plant...for instance every single smart/cloth pot I use grows a noticeably shorter plant than the same gallon-sized plastic pot that is thinner, but several inches taller. But obviously that doesn't mean that they are more "bushy."
Unfortunately, for me, because I don't LST and have limited space, this also means a smaller yield...but a much more manageable plant. (I grow in small 1.75-2 gallon pots, organic soil/methods).
Plants grown in my 1.75 gal, 6'" or so plastic pots, almost always get to 2 ft or higher, now that I've gotten much better at growing and understanding soil/nutrient science. A simple plastic tie pulling it down and to the side (the main stalk) results in bigger, lower positioned buds...but I have to stick with Ryder varieties due to their short height.