Ricky Hatton is a good example of the swarmer/pressure type of fighter. That's why I always thought he matched up well with Floyd Mayweather. Not that he would necessarily beat him. But on paper, their styles make for an entertaining match up. At Jr. Welterweight, anyway.
His last few fights, however, make you wonder. Swarmers need to be in fantastic condition to fight in that style.
Manny Paquiao is another one of the top swarming fighters in the game today. The one fighter who comes to mind who would have had the perfect "slugger" style to matchup with him would have been Naseem Hamed.
Maybe taking 1 from the CF would be the way to sim it when a swarmer faces a slugger (advantage to the slugger) or when a swarmer faces a boxer (advantage to the swarmer).
Just a few thoughts on it