Some excellent helmets are made by molding the EPS in the shell rather than adding the shell later. Beware of marketing gimmicks. Excessive vents mean less foam in contact with your head in a crash, which could concentrate force on one point of your skull. There is no real advantage to using titanium in a helmet. Dark helmets are hard for motorists to see, and even those silver stripes on many helmets that look reflective are not.
Skinny straps are less comfortable.
Few riders need visors, which can snag or shatter in a fall. Mirrors are a necessity, not a gimmick, but they need a breakaway mount. The wire type mounted on eyeglasses can gouge your eye in a fall. Standards A sticker inside the helmet tells what standard it meets. ASTM's standard is comparable.