If there is one thing that the NFL Draft is good at, it's lumping players into certain categories and trying to draw comparisons between them and past players—good and bad.
When drafting, teams are taking a risk that the performance they saw in college will translate into the pros in a relatively short amount of time, if not immediately.
The best way that analysts and scouts have to make their points, fair or not, is to draw parallels between the prospect on the field and past success stories or failures.
This is why so many little things about the combine and pre-draft workouts get so hyper-analyzed. No team wants to waste any picks, especially in the first few rounds, and using comparisons is one way to do it.
So get your stopwatch out and start taking notes.