I only had dinner once at Amandari and my memory is bad, I always thought that the Alila is across the river from Amandari and you can see the pool of the Alila to the north.
But judging from the Amandari pool and the layout this one looks more like it
http://maps.google.de/maps?t=h&hl=en...,0.004141&z=18
But which hotel is the other then?