Think immaculate case work inside and out. Until one flips the inner lid, both machines look identical except for different socketry in the back.
Hence the power supply with 50VA screened R-core transformer and 2 x 15'000μF Nichicon caps is shared.
Likewise for the twin-bay drive slots.
It's underneath them where the action diverges. As the harder-working deck, CX has not just a copper-colored heat sink but big heat pipe which bolts to the twice-thick right side. This demonstrates how much hotter its processors are expected to run.
Because I was unfamiliar with how to undo the cable connections, I didn't unclip them. So our views are by necessity sideways. Better that than me not getting things back together in proper working order.