Caleb Wiles does the best looking Twirl i've ever seen. Check him out on the Tube. The Shapeshifter is my preferred weapon of choice however, just because of the visual aspect and let hand movement.
I have never been able to make the Twirl change deceptive enough for me. It happens too slow so that the orientation of the card is obvious in my opinion. I have seen others though that have done it very well and very deceptively. it just looks like sh*t in my hands.
I prefer the Twirl Change for a few reasons. This is because is can be performed one-handed, the orientation of the card appears to have stayed the same throughout, and it has more applications (as previously stated by The Tumbleweed).