Bucky Brooks examined this seemingly random question at NFL.com, and the result is positive for the Tampa Bay Buccaneers: Brooks thinks Vincent Jackson is a better receiver than Brandon Marshall. That in and of itself isn't all that interesting: the two are very different receivers who rely on different techniques, and a direct comparison is more a matter of taste than anything else. But the story is mostly interesting to me because of the various details on technique and ability. Brooks goes through a number of Jackson's plays to showcase his abilities, and comments on the specific attributes that make Jackson a top-notch receiver. I'll highlight a few of those quotes, but you really should just read the entire thing:
He excels at blowing past defenders on vertical routes, but also displays the ability to outleap opponents for contested balls in traffic.
Jackson excels at running the vertical portion of the route tree. From the "Bang-8" (skinny post) to the post-corner, he has developed into an indefensible threat in isolated situations with his speed and athleticism. In an offensive system that emphasizes the vertical passing game, he is a nightmare to defend.
Jackson has developed into one of the best pass catchers in football. He excels at tracking the ball on deep routes and his ability to make last-minute adjustments on errant tosses expands the quarterback's strike zone. Although he occasionally muffs a ball due to a lapse in concentration, Jackson's focus and consistency stands out on tape.
Jackson is undoubtedly one of the best in the business at delivering explosive plays (20-plus yards). He has compiled an impressive career average of 17.5 yards per catch by routinely getting behind defenders on vertical routes. In addition, he has become a prolific touchdown maker, with 37 scores in 91 career games.