Visually, there’s not much to distinguish the original XO from the XO 1.5. In all the pictures below, the original XO is on the left and the XO 1.5 is on the right.
The XO 1.5 is packaged identically to the original XO. Same box, same “egg crate” cardboard cushion, the battery in a plastic sleeve on top, and the power adapter. The only immediate visual cue you’re dealing with something different is that the power adapter is white.
My first thought was “How in the world am I going to keep from mixing these up?”
Opening them up and comparing them side by side, you’ll immediately notice the XO 1.5 doesn’t have the two pads on either side of the trackpad.
That’s the major visual difference. Pretty much everything else on these two units is identical. Besides the trackpad area, can you spot the other difference?
Here’s the original XO:
Here’s the XO 1.5:
Look closely at the monitor hinges. The original XO’s monitor hinge is completely smooth. The XO 1.5 has three raised dots on both sides of the hinge. So if you’re paying attention, you can tell which one is which when they’re closed.
But yeah, they’re remarkably identical, which caught me a bit by surprise.
Looks like my units are D4
the xo-1, 1.5 and 1.75 should look pretty similar. My c2 ramp unit didn't have the 3 raised dots.