My humble opinion;
All your phenos look amazing. Genetically all a part hence the difference in "growth", I second Shed on that being greatly to genetics. It wouldnt hurt a nutrient supplement, if you trust the process then trust the result.
Supercropping in any of its forms is always a good tool to amp your flower. But toping I feel takes a little longer to get back on its feet.
I would suggest pinching out the lower nodes and just leaving the fan leaf. Are you familiar with this training?
Anyways by pinching the weak nodes and leaving only the fan leaf, the bulk of energy and life juice passes up to the next node so if you pinch out 2 or 3 nodes that are small and you know wont give bud, you would be sending 2x or 3x the energy to the next node. In result extra juice and energy for the prime tops on the branch.
Keep the chin up, soon flowers come to the garden.