I've spoken to the folks at American Motorcycle Tire, where I buy all my motorcycle tires, and they know their products well. I asked them about the Bridgestone Exedra Max on the rear and they told me this tire is a mid-grade tire and Avon's are a premium tire. told me the bridgestone has softer and possibly fewer rubber compounds in it compared to the Avon's. they might be trying to sell more expensive tires, but thought i'd share my experience with everyone.
as for more wear on the left side of the tire compared to the right....
I'm a rider coach for the Motorcycle Safety Foundation, and i've had studies run across my desk about this very issue. nothing proven 100%, but experience shows that in countries where you ride on the right hand side of the road, the left side of the tire wears faster. in countries where you ride on the left side of the road, the right side wears faster.
the reasoning is that when you're riding on the right side of the road, riders will push the bike harder in a left hand turn because they have the lines to follow, and if they loose it they just slide off the road into some grass or something. so you push the bike harder leaning to the left and not as hard leaning to the right. riders don't push as hard to the right because there is no line to follow right next to your bike if you're riding close to the center line. also, if you loose it pushing the bike hard to the right, you could slide across the road into oncoming traffic.
so, your mind changes the way you ride your bike causing the wear you're experiencing. this above scenario is for countries riding on the right side. it would be opposite if in a location where you ride on the left side of the road.
Be well everyone!