Bob, a good way to decide is to look back to '98 when you bought the XC70 (then the V70XC, of course).
When I was looking at that time, I considered the Audi A6 and decided on the Volvo (in addition to being a Volvo fancier) because of carrying capacity. The Audi's lines are nice, but the degree of tumble-home, taken together with the inwards taper toward the stern of the vehicle, significantly limits carrying capacity. With such capacity very much a consideration at that time, there was really very little to push Audi. There's also the fact that here in Reno (elevation 4,500' to 5,000') a turbo works very well, indeed. Good mileage when you don't need to push hard. I assume that Audi is still fitting the bi-turbo engine to the AllRoad, but when our old V70XC can cruise over Donner Summit (7,300')
with power to spare . . .
Good luck in the choosing.
bob noble
Reno, NV, USA