It's impossible to gold max the Asterion at this point now, since its EIP is not available anywhere. Asterion EIP was available in legend store in 2019 before Gameloft removed it. That's very shame when Asterion EIP was removed from legend store.
Calling a car "much better" because it's free is the biggest load of bs I have heard from an Asphalt player. A real legend pays the price. Nothing worthwhile is free.