IMO, there are few construction differences between "RV" tires and "truck" tires of the same grade. There are many differences between manufacturers and countries of origin.
I replaced the tires on my RV and did a lot of research on brands, load ratings, tread depth, UV resistance, pricing, etc. "RV" specific tires normally have a higher percentage of UV resistant compounds built into the tire, but load ranges and sizes and performance seem to be the same between similar tires of both types.
Truck tires do have more categories of use. Drive or Steer or Trailer tires are used on specific applications. They also have AP or 'all position' tires. They have ranges (Long haul, regional, on highway/off highway, etc). And they have usage recommendations (garbage, ambulance, trailer, etc). RVs normally use the drive, steer or AP tires, unless you really want non steer tires on your rear axles. From the RV manufacturers, almost all RVs come with AP or steer tires.
The biggest differences appear to be reputation and price and personal experience of the buyer. Each company seems to have followings of 'lovers' and 'haters'. But overall, there appears to be a general split between brands of really well known tires (Goodyear, Michelin, Bridgestone, Continental, etc) and the not so well known tires (Hankook, Kelly, Kumho, General, etc). Same with countries of origin. A split between well known countries (US and France) and not so well known countries (China, Korea, South America).
In the end, my decision for my size was based on national presence, performance factors (load range, tread depth, warranty) and price. I chose truck tires because they were less expensive than RV tires of the same size and performance where I live.
Here's a link to some really good info on tires and what to pick. It is for 2006 so some of the tire models and sizes that are available might be different than today.
And just to reiterate, I began this reply with the acronym IMO....in my opinion.