Asus has gone a bit insane. There are two versions of the ZenPad S 8.0: The Z580C and the Z580CA.
And within those two versions are variations based on RAM and internal storage.
See the chart after the break.
Differences are highlighted in red. Click the chart for full size.
Since neither of these spec pages are tied to any specific region, it’s difficult to know who will get which variation of the tablet.
All I know is that this already too damn confusing.