Floyd defense and intellect in the ring is better then Jones. Floyd is more business and less show boating comparing the two not to mention a better chin then Jones as well. Even if Ortiz can catch him flush i don't think he'll be able to follow up on it.
If Ortiz KO's Mayweather it will be because he was the better fighter, or because he got a lucky punch in. Always possible. But one thing we know. Mayweather is a professional in the ring, and he will take no one lightly.
I think it would be a great thing for boxing. Not necessarily because I don't like Mayweather - I think he's a fantastic fighter - but because this is how stars are built in this sport. By young fighters knocking off their predecessors and becoming attractions the sport renews itself. That said, I don't think Ortiz will be able to do this and Mayweather will actually retire undefeated after one or two more fights.
The problem is how is he gonna know when his reflexes fail him? He might be in denial like Mosley thinking he's still a "fast" fighter.
He took Castillo lightly and showed up with an injured shoulder. That or he wasn't injured at all and Castillo really did outbox him.
People saying Floyd would never take anyone lightly. He took Castillo lightly when he fought injured and he took Shane lightly in the 2nd round when he wasn't really boxing him. Sooner or later he will do that to the wrong puncher and they will catch him and finish the job.
Then its about time we realize that time does in fact progress forwards, people do age, you too will die. There will be a new generation of fighters. The fighters you grew up watching will age and slowly disappear. Your kids will grow up watching and idolizing this coming generation of fighters like Ortiz and then at some point in time the process will repeat itself. This will happen. This has to happen. This is what always happens.