the one on the left is tts. there is like 1.5 thumb widths at least, and that continues around all of my other toes on the outside. when i take a step the shoe creases around the whole edge of my toes.
the one on the right is .5 down. a little hard to see with the angle, but there is about a thumb width of space between my big toe and the end and about half a thumb width around the other toes.
i'd say it's just personal preference. at most i will be wearing a super thin sock, but i will probably go no socks many times over the course of the summer even though i know they will get nasty.