It will shock you to learn that NFL team evaluate talent differently. It's okay, breathe.
How do I know this? Well, one reason are leaked photos of the Dallas Cowboys' draft board. Here's the clearest picture and another picture, sans Jerry Jones.
They had Golden Tate with a late third round grade; he went to Seattle with a late second round pick. It looks like they have the Rams' second round pick, OT Roger Saffold, graded as a third round pick. They had Bradford graded as the top pick. Those are the only Rams picks I see. If you're handy with the computers, I urge you to break out more info and see what other picks they have graded where. I'd be interested to see, as would we all.