In Oregon they allow both, abet the salt in only certain problematic places and LEOs give tickets out like candy for having studs on past March 31. Put me in charge and both get banned, studs with malice for the sound they make.
For chasing storms in the Cascades, non-studded Nokian Hakka LT3's (stock size) have done me well for the past two winters. Only complaint is they wear fast, have probably two more winters (this one included) left in them.