square pot vs round pot

Is there any ( growth / yield ) difference from using different shaped pots?

Sure weed likes deep pots, but im talking the shape of the sides, ie : round or square.

I'm sure that you could fit slightly more square pots into a smaller space, but other than that are there pro's / con's about using one or the other?

* Im mainly looking for answers regarding soil growing *

yes you got it you can fit more plants under an area with sq. pots....

But is that it? I wondered if the different shape would make a difference for the roots etc

Assuming they are roughly the same size, the only real benefit you'll see is more efficient use of floor space with the square pots.

Pro-pack them together like crazy. Con-makes it a bitch to rotate plants.

square pots have more area within themselves giving more room for root growth, therefore nicer plants