I always thought the most important thing in a helmet is fit.
Find a style to suit ,and then check them out for fit.
They all meet a standard.
I have had all the major brands, currently with a zeus.
Fits me like a glove , an I liked it so much I bought another one 2 years later.
nothing worst than having gear that feels uncomfortable.
When I am thinking about riding, I usually are
KX250, XR 250,KLR250,GPX 750 ,GPX 750 again, DL1000.