Five reasons Mayweather will outshine Pacquiao this fall

 Boxing's two biggest pound for pound stars will be stepping into the ring this fall. While Floyd Mayweather and Manny Pacquiao still aren't fighting one another, each is in a high profile match which will command the attention of the boxing world.
Floyd Mayweather will return from a long hiatus on September 17th to meet WBC welterweight champion Victor Ortiz, and Manny Pacquiao will put his WBO welterweight strap up for grabs on November 12th when he meets Juan Manuel Marquez in a 144 lbs catchweight bout, the third bout in their series.
But which of the sport's kingpins will come out looking better? Here are 5 reasons why Mayweather will outshine Pacquiao this fall.
1. Ortiz's Style: Ortiz is going to bring the heat against Mayweather, constantly coming forward and attacking. Not only will this make the fight exciting from the start, but it will force Mayweather to stay busy as well. Contrary to popular opinion, Mayweather is at his best, and most fan-friendly, when a fighter steps into his wheelhouse.
2. Ortiz-Pacquiao Similarities: Victor Ortiz has several important similarities to Manny Pacquiao, all of which seem to hint at the possibility that Mayweather will be using this fight as preparation for a showdown against Pacquiao, perhaps sometime in the first half of 2012. Ortiz is an aggressive southpaw with great punching power, and he has quick hands. All of that means that Mayweather will be particularly geared up, focused and ready to perform.
3. Marquez's Style: While Ortiz's style seems likely to bring out the best in Mayweather, Juan Manuel Marquez's style serves as a dangerous riddle for Pacquiao. Even including Pacquiao's 2005 loss to Erik Morales, the man who has most flummoxed the Filipino icon since his US debut in 2001 has been Marquez. Marquez and Pacquiao clash in exciting fashion, but Marquez doesn't serve to make Pacquiao look "good".
4. Marquez at Welterweight: We've seen Marquez once at a weight above 135 lbs, and that's when he fought Mayweather. Mayweather, not a big welterweight, seemed much larger than the lightweight champion, and Marquez looked lethargic at the higher weight. Knowing that already, even a dominant Pacquiao win wouldn't mean as much, or seem as spectacular, as if the two had fought for a third time two years ago at 135 or 140 lbs.
5. Mayweather's Comeback: The long absence of Mayweather has created more intrigue for his upcoming bout. Will he be rusty, will he be able to keep up with the younger, more powerful, Ortiz? Meanwhile, we've seen a lot of Pacquiao lately. In fact, we've seen him fight eight times in the same period of time that we've seen Mayweather fight twice. That's a major plus in his favor when comparing the two fighters, but it also means that perhaps fans have gotten used to him and some of that intrigue is gone, particularly as opposed to Mayweather, of whom we have seen so little.
Sources: ESPN.com/boxing, Boxrec.com, ProBoxing-Fans.com