This recorder is pretty interesting. I think you're going to have a hard time finding someone who has both the A10 and the LS-P4, so you might have to rely on reviews/videos. Unfortunately, as you have discovered, youtube videos on most tech stuff isn't that helpful and nearly useless in some cases. For this reason, I haven't purchased the A10 yet...not sure if I will at all.
In the US, the P4 is about $60 less expensive than the Sony, not near the "savings" in Australia, though.
I'm also not that pleased with the rechargeable battery in the A10. In full disclosure, I do own the ux560 that jerryfreak recently compared against the A10, and it has a rechargeable battery in it. However, I was able to get the ux560 for something like $50.