I wish I knew for sure... My PG500 visually produces a good amount of smoke, all the way up towards 275F, higher then that it tends to get less visible.
My GMG Davy Crockett also visually smokes like a freight train, at least up to 250F, probably even higher.
I have a Rec Tec Stampede, that doesn't seem to smoke all that much, or maybe it's just harder to see the smoke, since it comes out of three holes on the back, rather then out a smoke stack. But I was pretty sure it didn't smoke as much...
One day, I decided to do a test of the Stampede vs the Davy Crockett. In the back of my mind, I was sure the DC would produce more smoke flavor. I sat both grills up right next to each other, I used the same pellet mixture in each of the two grills, I used a fireboard to monitor the temperature in each... I got both of them running as close to 225F as I could, then sat out to cook some meat ( I think it was pork, but I'd have to go and try and find the information that I collected when I did this to know for sure ). I cooked the food to the same temperature, it took about the same amount of time to get done in each, which further reinforced my belief that I had the temperature controlled pretty well..
I pulled the food out... ( I'm pretty sure it was pork ribs , almost 100% sure now )... The food from the DC was noticeably darker in color, like very noticeable . But, in a blind test, neither me, my wife, or my daughter could taste any difference in the food.
I haven't yet done similar testing with my PG500, but at this point in time, I would have to assume, there wouldn't really be much if any difference in taste if one of the items was cooked on that pellet grill either.