Which is better is a subjective question. It depends on who you ask and what they prefer at the time.
The above poll is therefore flawed.
I would suggest changing it to ‘Which do you prefer’
I don’t say it to be my own view, but some people only like, e.g, classical music, and have no choice for it.
The poll is thus not only flawed for asking “which is better”, as not only it is a matter of tastes and each of the available choices probably has as well good music (assuming of course such a thing could exist in Metal or Techno) than pure trash, but also for not letting polled people do other choices.
However, people search more for “which is better/best” than “which do you [I?] prefer”. So if you want more visitors via search engines, etc, you need to target the keywords “which is best”.