You can't really compare the light saber skills between Maul from episode one and Vader's light saber skills from episode 4, 5 and 6 cause 4 5 and 6 are much older so the light saber fights weren't as good as in the new ones so they couldn't really make Vader do all the tricky stuff in the old ones. Vader would kill Maul
Odd witht the technology readilly available the suit should hamper Vader at all. General Grievous is almost all machine and he is formidable force against Jedi... I see no proof the suit was the problem...
Perhaps his human side was the cullprit...damaged as it was... He did continue attempting to heal him self in the empire strikes back
what ever the resaon he moves slow now has to be because of the injury
vader would beat maul hands down
damn rite he wud choke him CHOKE HIM