I have a ekoi corsa, it’s very low profile and the magnetic strap thing is cool, but...
It’s really thin and I would put it in the plastic hat territory, rather than something to protect the head.
I have another one, an ar13 I think, it is low profile, but not hugely more than the kask vertigo I had before. They all meet the EU standard so aren't they all basically as good as one another until you add MIPS? That is what I was hoping!
When you say an old skool helmet, how old skool do you mean? Ekoi Legende looks almost like a leather helmet. I like their helmets a lot in general.