if you aren't too far into bloom, it'll be a negative effect. what you cut off won't grow out and it'll only result in lower yield.
LST it.. bend it down, even if temporarily until the other stuff catches up. HST is a good option later in blom of they stretch too much into lights and start damaging themselves.
so, topping is great as long as there is time for it to grow out. sometimes more branches off the same limb is not teh best option though.. you'll just spread what that limb can provide for way too thinly.
if you are using a scrog you should have put it down sooner and this wouldn't be an issue. you just keep bending the branch under "next" square of net. this keeps it even until you fill out aobut 70% of space. at that point if you flip it should fill in the rest easily with the 4+ weeks of growth that remains after flipping to bloom. you still have to do some minor LST to keep it perfectly even if you want to... sometimes it just takes bending a branch down in the morning and the time it takes for it to recover something can catch up uite a bit in that time.. repeat until satisfied... bigger variation may need a multi-day tie-down.. but then can release it later once things even out.
so many options, but it shouldn't be a ton of effort or work.. if so, change behaviour.