Razer is better in my opinion
symmetrical (Superlight) vs asymmetrical (DAV3). Depends what you like.
Razer DAV3 feels bit bulkier/bigger and maybe feels bit heavier but not by much.
Razer M1/M2 clicks feels better imo. Scrollwheel is more smooth and not as loud as Superlight.
By far biggest difference to me is side buttons as Superlight has pretty small ones and you need more precision to press them while DAV3 has larger, more tactile and easier to press side buttons. Maybe not big thing for everyone, but as someone who uses melee on side buttons having easy to press ones makes a difference.
but both are great mice and it only depends which shape you like more.