"I think the Sony one's got a current limiter in it"
It's a ferrite suppressor, not a current limiter. If it were a limiter, they would be spending money for nothing (hey, face it, the manufacturer doesn't care about you). A ferrite suppressor is there to reduce RF interference, and to comply with noise emmission laws, and enable the product to be sold in any given country.
One is out of the goodness of their own hearts, the other is mandated by law. You guess which one is more likely?
Biting the hand that feeds IT
