User blog comment:KidLego09/Could B and Beardo Be Brothers?/@comment-24152851-20140915033818

Lots of characters share similarities like that:
 * Dawn and Ella
 * Owen and Sugar
 * Justin and Alejandro
 * Manitoba and Jasmine
 * Noah and Dave
 * Lindsay and Dakota

It's called Suspiciously Similar Substitute and Total Drama has a whole list of them there.