I was just at Toyota's Mega Web Dealership in Odaiba, Japan yesterday, checking out the Prius Aqua and I noticed that it has different back seat headrests! They are flat and look much better than the US ones. Has anyone else seen/noticed this? My question is, are they compatible? If so, I'm going to look into grabbing a couple while I'm over here in Japan. I'd much rather have those in the back, than the tall, view impeding, ones we have in the US.