You really ought to try a few on.
THE One is really really nicely made, as is the 661 evolution in my experience. (btw the evolution has a clip like an xc lid, most others have d-rings like a motorbike helmet if you are fussy about that sort of thing) I’ve never been convinced of the need for carbon over fibreglass given the usual 100% price hike for a given helmet design. Most £100+ fibreglass helmets are pretty light anyway, and i just can’t believe that carbon fibre, glue and the time/skills to work with it makes 100% price difference over hand-laid fibreglass when the inner polystyrene, pads, straps, paintjob/finishing is the same, and the overheads for transport/distribution are too. 😕
If it was me buying a helmet again, and if i knew it would fit well I would see how cheap I could find a ‘normal’ THE One out of that lot. Troy lee d2 is well nice if you can find it for that sort of money too.