Below are excerpts from the Reception Perception. I favor Allen by a lot, but to each his own.
Allen gets open at a rate matched only by two consensus stars: Antonio Brown and Odell Beckham. Allen posted a 77.6 percent success rate vs. man coverage, which was nearly identical to his 77.1 percent score from back in 2015. He returned to form after injury. Both data points cleared the 97th percentile among all NFL receivers sampled in Reception Perception history. He scored at or above the average for every single route on the tree.
In the first two years of his career, Adams struggled mightily to separate from NFL defenders, posting success rate vs. man coverage scores below the 10th percentile. He’s steadily improved in this regard with a 58.2 percent score in 2016 and jumping up to 69.2 percent this past year. Adams continued to maintain similar scores against press coverage with a 67.9 percent success rate, despite seeing No. 1 corners and jams at the line more often in 2017. While he is not a truly dominant separator across the entire route like top-tier No. 1 wideouts like Julio Jones, A.J. Green or even a Michael Thomas, Adams produces downright stellar scores on a handful of routes he’s frequently assigned. He’s one of the best slant route runners in the NFL, executing this pattern on 25.6 percent of his sampled 2017 routes while producing an 87.7 percent success rate.