KO ratio, over an entire career, means little. Floyd has ONE real KO since 2005, thats 8 years. Ricky Hatton. We all know the Ortiz KO was a sucker punch (that Ortiz deserved 100%) and isn't a testament to Floyd's power.
We don't all know the Ortiz punch was a sucker punch. The ref said time in, he said to box, the rule is to protect yourself at all times. Perfectly legal and well deserved. Ortiz had my blessings to beat the shit out of Floyd UNTIL he pulled that stunt.
Bernard Hopkins at middleweight had great power but he hasn't KOd anyone in 9 years! So what matters is recent fights, not entire career, when talking about KO power.
Like I said neither Floyd nor Guerrero are big punchers. Maybe Floyd stops Guerrero because he's schooling his ass or his corner throws in the towel but its unlikely we'll see some kind of one.punch KO from either man as they just aren't heavy hitters like that.