2020 Subaru Ascent & 2022 Ford F150 (ordered)
It's the truck. Yes the blade makes noise but this rig is a pile.The bulk of that noise is the blade on the pavement though, not the truck (unless it's running glass packs).
Given the significant range effect that cold weather and towing/hauling have on EVs, I can't imagine a scenario where it would make any sense on a snowplow truck (which is also usually full of sand)
Realistically, even when available, most outfits won't have EV trucks anyway. It's always the bottom of the barrel, worn out crap that gets used for that kind of stuff around here.