Tell me what you think is different in the Tesla vs GM vs Fiat.
It’s Samsung cells when you get down to it.
A million different pieces of engineering, primarily, that the battery is designed to be much easier to replace than disassembling the entire car like the Fiat is.
I am telling you as a professional and an expert - there is almost no difference in the motors and battery systems.
Nothing is serviceable currently.
If you have a bad battery, it is highly likely your vehicle will be totaled.