Just one mans opinion........but there is hardly even the slightest manufacturing difference between the 3 you listed.
Or put another way, if you have the good fortune of getting any one of those 3 and it being a relatively trouble free experience, it wouldn't be because you picked the superior builder. Same could be said in reverse....if you were unfortunate and got a relatively problematic unit......you know where I'm going.
I actually have a 2017 Dutchmen Aerolite AND a 2018 Forest River Coyote.
I love them both. I've also been fortunate to have had good purchasing experiences with both. I live full time in the Aerolite. It's a bit more luxuriously appointed. But I've already travel-camped more than 65 days-nights in the Forest River and have only suffered a few loose screws.
Looking at them both from a carpenter, plumber, electrician point of view, I'd swear they came from the same plant. There's little differentiation.
Roll the dice! Cuz that's kinda what is required. And then go enjoy, regardless.