5 gal vs 10 gal pot

Bigger pot means bigger mass but you need more weeks of vegetative period to reach the maximum potential. Apart from this if you don't reach the big rootball you cans till have to water way less. It's also depends by the technique you're using. SOG require many smaller pots compared to Scrog

I grow in soil and started with 10, then went 20 fabric, 20 airpots, 30 fabric, now 10 galons fabric, would go for 10 galon Airpot now .... In my mind with soil - the bigger - THE BETTER ! I personally reraly transplant, but I learned how important good watering regime is and I follow it very strick, can be tricky ... Plus more soil saves nutes, you can use a lot less and later. Better taste qualities in my personal mind too. All the Best !

bigger the root mass = bigger the plant = bigger the yield. also bigger the costs. For medium and nutrients but not to to bad if you buy in bulk If you do it right its all good. I would max out my auto in soil at a 5gal though. photoperiods transplant and keep going up and up. Good Luck!