I am a huge fan of defoliation , but NO !!! I had to make sure, that I wasn't mistake in RQS test grow, so I planted few seeds as control garden, had amazing fast , beautiful girls, yours reminds me a lot,max I would do - SuperCrop main colas and give them support in 7-10 days for even out the canopy .
That's the end of those two :
growdiaries.com/diaries/52015-royal-gorilla-royal-cookies-grow-journal-by-asnoriu
Please, don't harm them ! You have space, they will reward you more.
From a huge fan of defoliation ...
All the Best !!!