This is a tough call...I'm going to lean slightly towards DVS on this one, but I would be very happy with either option. DVS get's the nod for price to start. Plus, I recently installed their front radius arms, rear panhard relocation bracket, & 1" spring perches up front to help level out...I've been very impressed with quality and function of everything plus all of my items were shipped out within 24 hours or less of ordering and to me in less than a week on the east coast. That said, I have no idea what the wait might be for the bumper. Negative on the DVS is the slight obstruction of the driver's side turn signal, but that could also be tire size and photo angle.
On the Dissent, it looks like a great option too, and no real negatives that I could call out. I just do not have any personal experience with them or know anyone that has. Full disclosure is that I have not seen either one in person to compare latching mechanisms, powder quality, or mounting (can't really see the DVS mounting to the chassis in the pics on their site).
I have the old school Kaymar on mine that the PO had installed years ago with right side tire swing out and 1 jerry can holder on the driver's side. Honestly, I'd like to get my tire off of the back and into the cab with a BellFab interior tire carrier, but as soon as I do that, I'd probably flip flop back! Underside is not an option for me (nor would I want it), my PO also installed a LRA aux tank which I love having.
Good luck with this tough choice...I'm sure either will look killer and function to match.