1)For rares:
MP0: you default MF is 100, cap MF is 375. So your total MF is 475.
MP10: you default MF is 100 unchanged, cap MF is 625. SO you total MF is 725.
725/ 425= 1.526. This means you have 1.526 times better chance to have 1 magic affixe on the dropped loots.

Nowdays, Most of all the gody or 5m+ items will have 6 affixes. So. 1.526 x 1.526 x 1.526 x1.526 x 1.526 x 1.526= 12.827. This means you have 12.827 times better chance roll an 6 affixes items on MP10 than MP0.

Also, On MP10, 100% extra items will drop than MP0. let say you are farming 5 times slower on MP10 than MP0. So 12.827 x 2.0/5 = 5.14.
[u]
THE CONCLUSION IS THAT YOU WILL LOOT 5.14 TIMES MORE 6 AFFIXES ITEMS ON MP10 THAN MP0 PER HOUR.[/u]

2) For legendaries
Although you MF is only 1.526 more on MP10 than MP0, the drop chance / MF ratio for legendaries is not linear, please note that it is not linear. I don't know the formular behind ,maybe squared or cubed or 4 or 5. However, you always can test it out. Based on my experience( i am a monk , I farm MP0 from para lvl 50-85 using TR build, farm MP9 from para lvl 86-99 using sweeping wind working machnism by swiching gears). MP9 LEG drop rate per hours is about 2 times more than farming MP0.

Note that I do ALK run on MP0 in 10-13 times including ID time. and I do it on MP9 in 30-40 mins. about 75-80% of LEGs are dropped from white mobs while doing ALK run on MP9.