You can get about 9 cm of height for every liter of pot size. So a 6 liter pot means your plants will get to ~ 54 cm before they get rootbound and you have problems. That's a pretty small plant; you'd have to start flowering at about 20 cm to be sure you didn't outgrow the pot and overstress the plant. If you're going for a SOG, use the small pots and harvest more often.

IMO, I'd go for the big pots. A plant that is 100 cm tall (pretty good size for a 11 liter pot) is going to give you a lot more yield than a 50-55 cm plant. But SOG growers may tell you different things.