Of course, safety, performance, and confidence have to be over arching considerations. I have tried the Bridgestones on another FJR and found the wear to be slightly lower than the RS3, but that set included considerable twisty riding in mountains, which eats my tires even faster. However moreover, I found the wet weather traction on the B/S to be far less, and exponentially less as the tire wore. Finally, the front B/S started scalloping on the right side about 1/2 into the wear. I freely admit that I am HARD on the front tire on my heavy bike. But the verdict - no thank you, Bridgestone.
On the other hand, I found no appreciable performance issues with the Dunlop. I'm not an aggressive wet weather rider, and the RS3 provided me with plenty of traction and confidence. Both the front and rear have worn evenly, and there is absolutely no sign of cupping or scalloping on the front. I think its a good tire for the FJR.
I guess once you get to that point, where you are satisfied with the safety, performance, and confidence of the product, then for me anyway, the next consideration is value. I get the tires mounted and balanced for free. So then it just comes down to cost per mile. I stand by the numbers I posted above. I've never seen a Michelin rebate on any Pilot Road tire. At today's everyday online prices, unless Dunlop offers a rebate, then it's practically a wash. With the rebate, a little savings.
One other thing to consider is the anticipated use of the tire. If I'm working on an epic 2-week trip, in which there is a decent chance I will be more than 5,000 miles, but less than 7,000 miles, then the PR4 would get the nod for me. If I thought the trip would go over 7,000 miles, then the RS3 would get the nod (with a rebate) because I know I will have to schedule a tire change to get home.
Which brings me to some heartburn. When I had my Gen 1 bike, a PR2 rear would last 8,500 miles, front 10,000 miles. You could set your clock by it. With the Gen 3 bike, the tire wear is substantially greater. Same roads for me (practically). Same rider, although maybe I'm riding differently. I dunno. But if I could find a rear tire that lasted 8,500 miles, I would never have to worry about making a tire change on a tour. <<<<< that's the heartburn. Having to deal with that on the trip. It takes enough time and imposition to change the tire, but the big deal is that I have to plan to be somewhere at a particular time.
And that's just NOT how I like to roll......