I believe Bing doesn’t like duplicate content, so has banned one of my sites; because my site is ALMOST ENTIRELY DUPLICATED CONTENT. But that misses the point.

There are many reason why you’d want to use Site A rather than Site B to get the same information.

Some obvious ones:

  1. Site A is faster.
  2. Site A doesn’t have ads
  3. Site A doesn’t use cookies
  4. Site A has an index
  5. Site A is cross referenced
  6. Site A’s 0.001% original content

In fact, the 0.001% original content could be the only reason needed for a site to rank well.