For IEM's what is better: round or square braid?
I want mine to be as compact as possible - is it really that big of a difference.
For a 4 strand cable, it's all in the look you like, not that big a difference.
I think there is unlikely to be anybody who has personal experience with both the round and the square braid.
Also, "feels better to wrap" is highly subjective, and has nothing to do with "technically better."
I think you are over-thinking things. They both look cool, and there is not going to be a huge difference in portability. That being said, Peter has stated that the square braid is the more compact cable, so if that is your criteria, there is your answer!