THE SPEC-OMEGA RGB INTERIOR
As already mentioned the Spec-Omega RGB is a medium-sized mid-tower and so as you can see both towers have limited interior space available.
Although both fans are mounted on the interior of the metal frame you can move them on the outside (in the fascia pretty much) to increase space for larger radiators (or dual fans in push and pull).
The single most important difference between these two cases (RGB aside) is the introduction of a removable plastic power supply shroud/cover in the new RGB version.
The mainboard plate of both towers has four rubber grommets and a very large hole underneath the CPU area.
All 7 PCI expansion slots use regular thumbscrews.
Taking a look from the other side of the case we see that both models are almost identical.
Both have a single vertical drive tray that has enough space for three 3.5" drives and two drive trays placed in the removable drive cage.
These trays are made out of plastic and are quite sturdy.
The difference is that in the Spec-Omega RGB version there's a RGB LED strip controller and a 6-way fan hub.
To remove the plastic PSU shroud/cover you will first need to remove these two thumbscrews located over the removable drive cage.
Here you can see the top fan/radiator area from inside both cases.