This other TeslaBjorn video shows that the heat pump equipped Model 3 heats up within 1 minute, and is way more efficient than the 2020 Model 3 with the PTC heater.
I don't think anyone has convincingly compared total heat output yet, but anecdotally the total heat output from the heat pump is at least as good as PTC down to -25C. Tesla Bjorn has some great videos staying overnight in the car and driving at -25C, and the heat pump has always been more efficient than PTC at all temperature ranges. For road trips, one of the big benefits is the ability of the heat pump to scavenge waste heat from the battery after supercharging.
Also, as a side note, I have experienced temperatures down to -8F this winter, and my car has never proactively heated the battery without me preconditioning. Checking Scan My Tesla, it looks like the temperature target for active battery heating (of course excluding heating before charging) is -27F. So there are very few situations where anyone should be worried about the car wasting energy heating up the battery for the winter!
I don't think anyone has convincingly compared total heat output yet, but anecdotally the total heat output from the heat pump is at least as good as PTC down to -25C. Tesla Bjorn has some great videos staying overnight in the car and driving at -25C, and the heat pump has always been more efficient than PTC at all temperature ranges. For road trips, one of the big benefits is the ability of the heat pump to scavenge waste heat from the battery after supercharging.
Also, as a side note, I have experienced temperatures down to -8F this winter, and my car has never proactively heated the battery without me preconditioning. Checking Scan My Tesla, it looks like the temperature target for active battery heating (of course excluding heating before charging) is -27F. So there are very few situations where anyone should be worried about the car wasting energy heating up the battery for the winter!