Nothing, it just looks a little different. And for the drop rate, I would have to say I would prefer mana golem over the holy wasabi, as I turned in approx 105 times, but didn't get even 1.
Maybe you can do it for the gold, tho the wasabi drops around 15%, it is a good quest for gold, which can again be used on the Assistant Quest to increase your chance of getting uni 13 and the voucher.