At 130, JMM is way more experienced than Floyd who is green at this point. Marquez could give a lot of toruble to PBF and saying he would be target practice is just ignorant....
Floyd by easy and early knockout. Flyod looks very good against guys who are naturaly much bigger than him ...against similar sized men he destroys them-Ricky Hatton for instance. That said he probably couldn't even make 130 at this point...but if he could no problem with JMM
130 was easily Floyd's best weight. Watch his fights against Genaro Hernandez and Diego Corrales, or lesser guys like Carlos Gerena. You'll never see Floyd look as good at higher weights. Quicker, higher workrate, more powerful, more athletic, just an overall much better, versatile boxer at this weight.
JMM is good but he would never beat Floyd in any weight class. Floyd can do everything JMM can do except better. Floyd would be too strong for JMM and prolly get a stoppage.