1. OEM pegatron motherboard is mATX (fyi since that case you selected comes in an mATX size too).  Screw holes will line up either way, however.   2. Power button and LED wiring harness is proprietary and needs a rewire.  3. IO shield is welded to the case and does not have a pop-off attachment to transfer it to a new case like an aftermarket IO shield.  4. OEM USB 3.0 headers, the ground shielding is crossed between the black/blue headers, and so it triggers a boot fault if you hook it up to an aftermarket USB 3.0 header like in the new case unless corrected. You can solder jump the pins on the back of the motherboard to correct.  5.  POST checks for PWM responses from OEM Dell fans and triggers another boot fault if you install aftermarket PWM fans, with the exception of certain specific models which are similar to the OEM fans.  And no, this specific error cannot be cleared by not installing support assist, it's part of the pre-boot ePSA hardware check.  6. No thunderbolt GPIO header, since the case you listed highlighted a matching thunderbolt dock.         
I'm new to PC in general. I would like to switch my case from my Aurora R8 to a Razer one. Will that be possible?
Aurora R8, move components to Razer TomoHawk ATX case?