I would opt for super armor vs shield passive in PvP, reason why is because you avoid the Madara buff removal teams and give your opponent no quarter for producing combos on you at all.

I've run EM teams with super armor over shield passive, and most of the time, that has been the determining factor in winning vs losing when PvP, especially when matched up vs someone 30-40k power more than me. Avoiding those combos while applying dots have won me matches I should have no business winning.