The answers above are absurd, so let me rephrase the question:

Since every single recruiting service agrees that BYU signs FAR more talented recruiting classes than USU does, and since BYU signs FAR more 4 star and 3 star recruits than USU does, and since BYU has dominated USU on the field for decades, then why has USU been better at putting players in the NFL lately?

For the fools who think "the honor code" or "BYU's academics" are a logical answer to this question, remember, either because of those things or in spite of those things, BYU gets MUCH more talent than USU does.

Let me give you a hint: If BYU signs better recruiting classes with more blue chip players than USU does, and USU still puts more players in the NFL, it must have something to do with the development of those players once they set foot on campus. USU has done a better job developing players once they arrive on campus than BYU has. That's the answer. The follow up question is, Why?