One aspect to traditional helmet selection is air vents and insects.
Back in the days I used to wear a helmet (I don't any more) my helmet had good air vents running along front to back and annoyingly often whilst riding I'd end up with an insect trapped in crawling around in my hair unable to get out. Ended-up wearing a Buff under the helmet (which would get hot).
I've since understood some helmets have a mesh under the vents to keep insects out but I had my helmet, wasn't going to replace it and don't use one these days so never investigated.