Alright so I've topped 1 of each strain and 90° LST 1 of each, and this is my verdict. I will never top my girls again.
90° LST is the way to go. much less stress to them with more growth. you do this by starting to bend and stake them at their 3rd node and then continuously moving your stakes and weights until they are in full bloom.
The result is essentially the same as a ScrOG setup. but you don't have to deal with a grid in your way.