FloraFlex 9 3 gallon vs 4 5 gallon pots

I am currently setting up FloraFlex micro drip system with 4 5 gallon pots. I am now wondering if I should of gotten the 9 3 gallon pots in a 4x4. I have two 4x4 tents. One tent is for veg and one tent is for flower. I’d like to shorten my harvest times. Ive been harvesting every 2 months. I wish I had space for another tent for mothers, but I have been growing from seed to harvest. Any recommendations?