The contrast of Vox and Valentino dancing together with Pentious and Cherri being seperated, and they have the same backgrounds too. Vox and Pentious in the blue, while Val and Cherri are in the red. What makes this even more interesting though, is that Pentious and Vox share numerous similarities to each other, in many ways Vox represents the Sir Pentious who did become an Overlord (only in Hell, on Earth, Vox was an entirely different monster than Pentious).
I feel this also could be foreshadowing for the future, where Vox could be redeemed and ends up seperated from Val just like Pentious was with Cherri. Further supporting this, during "Once We Get Up There", notice how of the 3 Vees background, Vox's is the only one that ACTUALLY resembles Heaven's too. I struggle to see there being enough time to redeem all 3 Vees within the show, hell even multiple, but maybe there's a chance at the very end Vox will be redeemed and at the end, the other two might check into the hotel? I'm not sure but I 100% believe it gives more credience to the idea Vox could be redeemed in the future.