I don't know what strains those are but I'm sure there is room for improving yield and size of plants. There always is...
$1 more in soil will increase your root space 50%. More roots equals bigger plants. Bigger plants equals
higher yields. 2 gallon is a little small unless you are running coco coir or just don't want the them to get to
optimum height
if your doing autos no need, 2 gallon soil is plenty of room .i always check my roots they have more than plenty of growth room , with a small grow area like i have why take up more space with bigger planter ,i've used bigger planters and settled on 2 gallon . 1 gallon per foot (plant height)
is how i figure what size pot i use.
here are a few posts to read <
https://www.rollitup.org/general-marijuana-growing/25691-container-size-relation-plant-size.html