The comparison is far from honest. It leaves out iTunes and Airplay, it discusses CPU cores and memory without explaining to the consumer how that will affect their streaming experience, etc.

Amazon is at least being consistent about leaving out proprietary/locked services. For instance, they don't list Google Play, Xbox Video, or Playstation Video.

Right, because “number of cores” is an honest way to compare processors (and why does the customer even care about the processor?).

It is called marketing. Cores do not matter, until they do for marketing reasons. See recent Apple keynotes.