at or in? (He's better in/at English than me)

English as a Second Language English Vocabulary, Grammar and Idioms
1

[color=red]“He’s better in/at English than me.”

“…he has never been better in/at defending her philosophy…”.

Hi,
Which one is the correct preposition, please? Both are possible depending on the situation?
Thanks.

2

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Both are possible and in use, though each has its proponents.
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3

Mister Micawber,

Does it apply to good as well?

4

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Yes, and bad and worse and terrible etc.
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