VE is OOP. DVE has terrible navigation, but the content is actually pretty good, except for the sub calibration tone; it has a 10 dB encoding error. DVE also has the rear channel tone for 6.1.
Avia has much better navigation, arguably better and more extensive audio testing options (although it lacks the rear channel calibration), the sub calibration uses redirected bass and you can check all five channels (which requires your speaks to be set to small).
Overall, Avia remains my reference for video and audio calibration but I could get by with DVE, if I knew about the sub calibration error and accounted for it.