as long as we ignore the CO2 dumped by Camry/Prius and its cohorts across the industry causing existential crisis hey they will beat others on cost/mile.
If you really want to go down this route and account for this externality, you should calculate the cost of carbon capture. Costs of carbon capture are around $100 per metric tonne. The above link suggests a differential of around 6-10 tonnes of C02 in favor of the Tesla over a hybrid. This amount to an extra $1000 in favor of the Tesla. Once again, this doesn't change my point about cost per mile at all.
Note that it's not a 35% improvement/decrease, it's a 65% decrease, or put another way, 1/3 the emissions. It's not an order of magnitude, but a factor of 3 ain't bad, and CO2 from battery pack production will get better as the energy sources used get cleaner. Also, it looks like they're assuming a car lifetime of 250k km, which I think is pretty conservative for these. They also assumed a linear decrease in CO2 in power generation, which they say is a conservative assumption, and I agree. A number of their other assumptions lean on the conservative side, I assume for being more defensible, so I'd be somewhat surprised if the real difference isn't a good bit larger.
If you really want to go down this route and account for this externality, you should calculate the cost of carbon capture. Costs of carbon capture are around $100 per metric tonne. The above link suggests a differential of around 6-10 tonnes of C02 in favor of the Tesla over a hybrid. This amount to an extra $1000 in favor of the Tesla. Once again, this doesn't change my point about cost per mile at all.