I love smart pots. I've been using that with royal gold Tupur and have been enjoying the results.
So here is an example of 6 plants in 1 gallon smart pots and 6 plants in 2 gallons. Notice the size difference; the two gallon plants are substantially larger.
The 1 Gallon pots are kind of neat, sometimes plants I've grown in small pots just end up being the most phenomenal bud.
So for now I'm going with 2 gallon fabric pots with my autos.