With MIPS and POC's "SPIN" system harnesses, it's difficult to say whether a helmet will fit comfortably from looking at the helmet shape. Now it's really the harness that determines fit and comfort.

My POC helmet looks rounded from the outside, and the Ventral and Octal helmets look like mushroom heads. But the harness and liner are adaptable and comfortable. POC helmets are less cluttered inside and the harness looks simplistic compared with Bell's rather elaborate interiors on their MIPS lineup. But it's darned comfortable and better ventilated due to the POC vent designs and uncluttered interior. But the Octal and Ventral are an acquired taste. The pro peloton has made them sorta acceptable but they are gooney looking lids. I'd wear one anyway. But it'd be hard to keep a straight face while cussing at a rude driver while I'm wearing a pink mushroom on my head.

With my older Bell, not a MIPS model, the harness was less flexible and adaptable so it might not have been as comfortable or secure on someone with a more rounded skull. It fit me fine.