Lisa, this link…
https://www.michelinb2b.com/wps/b2bc...s_Brochure.pdf
…should take you to a Michelin RV Tires guide/brochure which was published less than a year ago in June 2019.
Lots of good information in there, but the short version is if you go to the chart on page 16 of the guide you’ll see that for 295/80R22.5 tires there are three choices:
X COACH HL Z – See Page 17 for more info
X MULTIWAY 3D XZE – See Page 19 for more info
XZA2 ENERGY – See Page 19 for more info
And for 315/80R22.5 tires there are two choices:
X LINE ENERGY Z – See Page 18 for more info
X MULTIWAY 3D XZE – See Page 19 for more info
As you can see, the X MULTIWAY 3D XZE is the only one available in both of your sizes (295 & 315). As such, I’d be inclined to go with that one, but your tire dealer can probably provide more info & advice regarding the alternatives.