Difference in Michelin Tires XZA3 vs XZE

Jim, I ran Michelin XZE OTR (over the road) for most of my driving career! I've read where people have posted "What's so great about Michelin Tires" I didn't respond to the basher but, I honestly can tell you I drove over 4 million miles on Michelin tires without a blowout, cracking or bubbling etc. on my Semi. And I ran Michelin XRV's tires (G Rating) on my coach for 10 years without a blowout, cracking etc. and I had a new set of Michelin XRV's put on my coach several months ago. All the miles that I ran on Michelin tires with no tire problems that's not good luck, that's a good quality tire and that speaks for itself. Those Michelin steer tires that I ran held up and as far as I'm concerned saved my life. Tire maintenance I strictly adhere to the Michelin Quality Care that's posted on there website. The difference you asked about between the two tires are the XZE+3 has more elastic material built into the sidewall (beefed up) so there a stronger sidewall than the XZE when hitting curbs. Also, Michelin cut down there siping in this tire over the XZE to make the 3+ a flatter tread to make the tire smoother on the road surface. If your not aware Michelin sipes all there Truck and Motorhome tires. Lastly the +3 tires can be regrooved (recap) up to 3 times. Never run recaps on your steer axle if you care to have the +3 regrooved! It's possible to lose the tread in extreme heat. IMHO, If I was still driving OTR or owned a DP (H rating), I would run the XZE. Good Luck, Rooster