Alpaca instead of wool?

I've read that alpaca is as good as wool for helping locks forms, and that it's far softer to sleep on. Anyone know anything about alpaca compared to wool for locking? Anyone ever use it?

updated by @rheana-hayes: 01/13/15 10:02:55PM

it is more fluffy & softer to me, i would think it wouldn't be as rough to rub on compared to wool so may not help as much but i'm unsure. i have a tam that is alpaca/wool blend & i haven't noticed anything one way or the other with it, but it is a bit warm lol