Call me crazy, but I actually like them both to some extent.
I like LegendaryFrog's drawing and animating style. Humor is not his strongest area, but I find some of his submissions funny, like FF7: About Random Battles. Also, when I was new to the site, and saw Chocobo Mix for the first time, I thought it was pretty hilarious. It was the first FF related flash I had seen, so it appealed to me. I showed it to a few of my friends, and they liked it too.
Piconjo just... seriously cracks me up sometimes, as much as I try not to laugh at his pen0r jokes. And he (or his crew) has some awesome animations, like Besitzen Sie.