Viewed from any perspective, the performance of this car is better than [the performance of] your car
In the above sentence do I have to repeat "performance" for right comparison or ellipsis is ok?
Absolutely-- the ellipsis (the word that you don't have to repeat) in a comparison is the verb of comparison, not the item of comparison.
Ex. Correct: Tom eats burgers faster than Joe (eats burgers).--> Comparing Tom with Joe is logical.
Incorrect: Tom eats burgers faster than lightening (eats burgers?).--> Comparing Tom with lightening is not logical.
The performance of this car is better (i.e. more good) than your car (is good).--> Comparing the performance to a car is illogical.
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