I agree, with something as subjective as music or even creative writing: what does 'better' mean anyway?
Music, as all art forms, simply is a matter of taste. I admire Mika as a singer who writes his own songs, more than I would have if he were just a singer who sang other people's songs. As long as he's not being lazy in the songwriting (like, repeating the verse and chorus constantly as in Big Girl - I'm not a fan of that song), he's always written what he feels is genuine, and that's the most important thing to me. I understand that some singer-songwriters write more poetic or eloquent, but I could listen to them as well when I want to. As for Mika, like any artist, as long as he writes from the heart, you can feel that it's genuine and that's what I search for in musicians that I listen to and look up to.