You could just go with the Motor Trend quarter mile road test results for both cars. 11.6 Tesla. 11.7 Hellcat. Cars in stock form tested by the same magazine. Both were likely on a non prepped surface, not a drag strip.
It is best to just acknowledge the Tesla is also quarter mile quick and move on.
There are going to be some upset Hellcat owners when they acknowledge their first Nisson GTR on the street. Motor Trend tested it at 11.1 in the quarter mile stock. God help the Hellcat owner who tries to keep up with it on the twisties. Yes, it is a somewhat ugly and more expensive car. You can always mod the Hellcat by adding drag radials, but you can do the same with the GTR and there are plenty of GTR's already on the street pumping out over 1,000 HP on the street. If one beats you and posts it on Youtube, does that make it a better car that yours?
Any car can be modded in power, tires and driveline to the point where a comparison of the stock models becomes moot. A comparison of stock to stock cars available from the factory is a pretty valid comparison. A comparison of stock to a modded car is not.
There are a lot of cars available in stock form with amazing performance, some in a quarter mile, some in top end, some on a road course etc. When you go from appreciating each car for what is is and can do in stock form to "my car is better if I add this thing that the other car does not have" the argument becomes like something you see from a 16 year old on a Mustang Forum.