The additional weight, yes, as posted by @avidamoeba. Tho' those are different things, apples to oranges - brake dust and tire dust are not the same. With the power that some EVs have it's really easy to accelerate rapidly leading to faster tire wear. That is a choice made by the driver. I put my EV in eco mode, and gently accelerate. And try to ride my bike as much as possible, instead of my car. On the bike, I often try to accelerate as fast as possible, for cardiovascular and other health reasons, including just plain having fun!