My ayrtek is brill, it depends how much you got to spend though Ayrteks are a bit more expensive.
Personally on Looks alone, the Masuri hands down- they look very classy. On weight/tech and for the purpose of the helmet (to protect you safely) the Ayrtek, Good Luck.
ayrteks fit any head as they pump up to fit...masuri would be fine though and are also comfy. ayrtek for exact fits though