If it's Ferguson or Hill, I would take Ferguson.
I like Ferguson better, too. He might not have the pure speed to be an outside rusher, but the hand use and strength he shows could make him effective on the inside. I really don't see the quick penetrating ability in Hill's game.
Of course, one of the issues I have with Ferguson is that he was often lazy in pursuit. He played hard when rushing the passer, but essentially jogged when the play was away from him. So laziness might be a problem with both of these players.
I can't say I'm necessarily against either pick, though, because you get some warts in the late second round. The question is whether you think the player can overcome those warts and live up to the potential that made him second-round worthy.
I like the DBs better at 58 because I think the depth there could push a quality player to us, but if that depth gets devoured quickly in today's round, I have no problem going DL with this pick.