I like Plo a bit better if you're running Padme with multiple Jedi, but there was one GAC where I ran Kit under Padme for a single round (3 matches) on defense, and then in the same GAC but a different round (I think it was the one before not the one after) I ran her with Plo and Kit both. Of course, that was back when Padme had her zetas but was still g9, so I wasn't taking her too seriously yet. I honestly can't say how good they would be at g12 or higher - I was just using them to polish off some junk in the back during a full clear.
Short answer is that I like PLo's kit a touch better - the TM boost is inredibly useful in getting a fast start. But I haven't used either enough to give what would truly be expert advice or anything like it.
I say experiment with it and write up your results here. It's always good to be able to pad out a meta-level leadership ability with non-meta toons so that those meta toons can do more heroic work elsewhere.