I'm not even a big boxing fan, but it seems many people here are trying to imply that somehow comparing the fights vs Mosley, are acting as if this has any serious indications about a Pac vs PBF fight... The reality here is that styles make fights...
From my perspective, Manny is a fast, volume puncher, with great power, who typically relies on offensive pressure and relentless momentum/pace to dominate people and prevent them from being offensive.
PBF, every fight I've seen him in, fights very defensive, with lightning fast counters.
Mosley strikes me as someone who depends on his speed, something booth Manny and PBF surpassed him in.
The nature of the matchups, put Mosely on offense coming at PBF , and defense vs Pacqiao. Mosley was barely able to put together solid offense on PBF (after the near early round stoppage) and was tooled in Mayweather's game the entire rest of the fight. Pac, kept Mosley in his game the entirety of the fight.
The only things that can really be taken out of this fight is that:
-Fighting defensively did frustrate Pac's offense, even if Mosley was too slow to capitalize on it. That might mean Mayweather has a decent chance to impose his will.
-Mosley was unable to really get anything going offensively, and historically Manny's toughest fights have been against people who can come at him, like Marquez. That might mean Pac-man simply overwhelms Mayweather, with constant pressure and doesn't give him a chance to fire back
-Mosley, was able to badly hurt Mayweather early, until PBF got his timing down. Manny is faster than Mosley, could very well hit as hard, if not harder than him too...
Ultimately tho, both fighters can provide something that the other fighter hasn't yet seen, or been able to fight. They are both likely to be each other's fastest opponent. Mayweather's defensive skills are likely to frustrate Pac even more than Mosley, the question is whether or not PBBF will be quick enough to effectively counter Pac. On the other hand, Pac's offensive pressure, volume, and power are are something that Floyd hasn't had to deal with yet, but is it enough to shut down Mayweather's offense as well as it shut down Mosley's?
There are lots of unanswered questions about a potential Pac/MW fight, and that's part of what makes the fight so compelling. Let's hope they finally make the bout happen.
Finally, as far as answering the OP, without making insinuating about how that affects a potential superfight, I think they where both damn impressive wins. Mayweather came back from early adversity, and fought a brilliant fight after that. Paquiao took Mosley so far out of his game that Mosley never had a chance... both wins where amazing to watch.