Interesting... my current helmets, one open face with dd, an one open face with a sort of ratchet fastener and a full visor and a flip front that I only use in competition ( but not this year !!! ) that has the seat belt type. The d rings I can get tight easily and it never comes lose, the ratchet type is awkward to adjust and at least three times I have managed to undo it by accident and the seat belt type I just don`t like. fiddly.. So I am leaning towards the Spada, with no visor, the Bell Riot looks pretty good but a replacement visor is around half the price of a new helmet !
With the open face with 5 studs I can fasten two or three different type of visor which are quickly removed or put on and fit in a tank bag , rucksack or pannier. I don`t like helmets that aren`t a close fit like most of the ones with visors , thanks for your opinions