When people speak of "power" in a programming language, they generally mean expressive power. It's true that all (Turing-complete) programming languages can theoretically encode the same programs - but they do not all take the same time to implement. Lisp is more powerful than C; C is more powerful than x86 assembly; x86 assembly is more powerful than Brainfuck.

It's reasonable to ask if a given approach to language design results in more "power". It's not just a question of taste.