i hadn't thought at look at the orignal - your fingers move differently! i prefer your movement, although i think the original has a slightly more balanced look (fatter fingers). you seem to be using a regular pattern of movement - have you considered choosing which finger to move at random, so that the movement varies more?

[edit obviously i don't mean that the fingers move at random, but since you have two fingers on a hinge you have a choice when it comes to changing how they are arranged]