Mel Kiper Jr., ESPN NFL draft expert: Allen. We know he has the big arm, but he got better every day in Mobile. Allen was overthrowing on Tuesday, trying to showcase his arm while alternating reps with Mayfield & Co. That's when you could send his timing was off with receivers he had just met. But he made dramatic progress throughout the week, and was much better by Thursday. His ceiling is so high -- he could make throws down there that no one else could make. People always ask me about comps -- well, how about Matthew Stafford? He completed 57.1 percent of his passes in 39 games at Georgia. Stafford has been better in the NFL, and I think Allen will improve in the pros, too.

Todd McShay, ESPN NFL draft expert: Allen. Boy, this is a tough one. We're still a ways from the end of the process, but I'd lean Allen right now because of his frame and arm talent. A big part of it depends on what scheme I'm running as a head coach. But it's a legitimate debate between these two right now.

Steve Muench, Scouts Inc. draft expert: Mayfield. The bottom line is that it's easy to fall in love with Allen's tools, and it shouldn't surprise anyone if he develops into the face of a franchise. But Mayfield is the better quarterback right now, and this wouldn't be as much of a debate if Mayfield were two inches taller. He has completed better than 70 percent of his passes the past two seasons and is much more consistent. While Allen has the stronger arm, Mayfield is capable of driving the ball downfield and squeezing it into tight pockets. Both are athletic enough to buy time and scramble for first downs. Both are leaders with chips on their shoulders, but Mayfield is a four-year starter who led the Sooners to a win at Ohio State and two berths in the College Football Playoff. Allen is a two-year starter who didn't play on the same kind of stage or face the same kind of external pressures.

Matt Bowen, NFL writer: Mayfield. Allen has all the natural tools with that monster 6-foot-5 frame, ridiculous arm talent and the mobility to move outside of the pocket. There is a ton of raw talent to his game but some inconsistencies as well that need to be addressed. That's also why I'm going with Mayfield here. Looking back at his super productive tape at Oklahoma, and his rise in practice this week, Mayfield's accuracy, anticipation and quick release are a perfect fit for today's NFL game. He has a great feel for how to attack throwing windows, the touch is there, and he can drive the ball when he has to target tight coverage. Plus, I'm also going to look at the intangibles. Mayfield brought serious energy to the practice field in Mobile. And teammates gravitate to him. That's key when building an offense around a young quarterback.

Jeff Legwold, NFL Nation writer: Mayfield. At the moment there would be some talent evaluators in the league who would say neither of those players would be in the top 10 if prospects were stacked solely on grade rather than position -- quarterbacks in the first-round are often drafted above their true grade. But Mayfield, who played 21 more college games than Allen, is a more advanced player at the position and throws with better anticipation. In 11-on-11 work in Mobile, Mayfield showed he can run the show with composure and confidence. He's my pick here.

Josh Allen, QB, Wyoming

Allen is going to build momentum in scouting circles coming out of the Senior Bowl. He's already considered one of the top prospects at his position, and I expect there to be even more excitement about him now.

He didn't have a lot of success in the first half, and could have shut it down at that point, but he didn't. He came back out to start the second half, and I love that he did. He competed, and he showed his complete skill set in second half, finishing the day 9-of-13 for 158 yards and 2 TDs.

We saw his strength to be able to absorb hits and make throws despite the contact. We saw his athletic ability when he took off and ran a couple times. We also saw the fastball that everybody talks about -- he gets plenty of juice on his throws. However, both of his TD passes in the third quarter were beautiful touch throws. I also liked watching him interact with his teammates in this game. He had a lot of energy, and you could see guys rally around him.

The fact that he hasn't fared well against Power Five teams in his career has been one of the biggest knocks against Allen, but he took advantage of the opportunity this week to show the NFL that he can compete against elite talents. I came into the week with Mayfield ranked one spot ahead of Allen on my board, and it remains very close between those QBs. I'm not ready to call that race just yet.

Allen has some rough edges that he still needs to smooth out, but we got a glimpse on Saturday of what it looks like when it all clicks for him. He makes throws that no one else can make.