Michelin only markets one tire line as being RV specific and that is the XRV. It's not built in your size. The XZA2 Energy is a great tire in motorhome service it's built primarily as a long haul highway all position tire with low rolling resistance.
The XZE is also fine for motorhome service and is primarily a truck regional service tire also all position. It's not built better just with different target characteristics. It has more sidewall protection to better deal with curb hits and high scrubbing forces like many sharp turns.
There are a number of Michelin's that are used frequently on motorhomes but they are all truck tires.
Here is a Michelin guide:
http://www.michelinrvtires.com/assets/pdf/RVTiresBrochure.pdf