The issue is both as Intel use reviewers* for advertisement.
But where is the con though!?
If you read a review of the awful oem crap that is pre-built then it will show the cpu with a lower score. If you read a review of just the 8700( for example) in a custom build with good components and no tdp limiting, it will get the max score it can get. The problem is a lack of understanding how the components work (and this could apply to any product that uses "boost" clocks).