There's good and bad in everything. No different here. All you'll really get is personal experiences of people and the reactions from factory can very well be based on how owners presented their problems to the factory. So it's really not a good scale of what's good and bad.
I do own a Big Country. Purchased from a dealer who sells both Jayco and Heartland. I just liked the feel better in this one. Four season approved although I'll never use it in all four seasons. I do however pull it out practically every weekend from mid April til late October. A couple week long trips get mixed in there too. Hardly ever is this on a campground hard surface but usually on a grass field here or there. I use it and it holds up.
The same type of people build many of the same types of campers in the same communities. Most work piecemeal so the faster they get to quota, the sooner they go home. I would guess behind the walls most are the same. Outside the walls, well most use exactly the same or very similar products so essentially they are the same there too. It'll come down to price, the dealer interaction, and what feels right for you.
Good luck.