Clay, from what I hear from my dual-sport buddy, the adventure tires don't wear as well as the road tires if you're riding on the road. The adventure tires have blockier tread so that they can maintain traction in gravel and sand. The blockier tread puts less rubber on the road and they wear out faster on asphalt.
When I bought my first Kawasaki Concours it came with Dunlop K700 (F) and K701 (R) tires, both radial and, as far as I know, a Concours specific tire. I never heard of them being used on anything else. At 6,000 miles my rear had steel cord showing around over half the tire. I replaced it with a Dunlop K491 Elite II in a slightly larger size, identical to the rear tire used on the Goldwing 1500. It was a bias-ply tire and lasted me for nearly 15,000 miles. By 9,000 miles I had a K491 on the front, too. Lots of people really disliked the K491, calling it the EBWT (Evil Bike-Wrecking Tire) and said it had practically zero traction in the wet. I never noticed that. For the next 150,000 miles on Connies, I tried lots of tires, all bias-belted. I used Metzler 880 Marathons, Michelin Pilot GTs, and Dunlop Elite 3s. My favorite was the Pilot GT, but Michelin quit making it before I wore out my one set of those. I got a bit over 24,000 miles out of the front and about 17,000 out of the rear on the Connie, a bike with 100hp and one that weighed about 700 pounds. I got about that same mileage out of Metzlers, but didn't like their traction and feel as well as the Michelin or the Elite 3. I was going to try Shinkos but sold the bike before I wore out the Elite 3s that were on it.
I tried Metzlers on the NT. I put a radial on the front and a bias on the rear (couldn't find the right size radial Metzler for the rear), but didn't like the feel and went back to BT-023s before PR3s came out. Since having PR3s on the bike, I've had a Dunlop Roadsmart rear that replaced a PR3 that had a non-repairable puncture at Spearfish two years ago. The Roadsmart didn't last as long for me as the PR3s I've had since.
I've got a PR4 on the back now and a PR4 front waiting on the front PR3 to wear out.