I've been doing internet searches/reviews on 19.5 tires for awhile now. I've come to the conclusion that the only users having any reportable problems are the semi-truck tractors with serious heavy loads and hard use. I've read way too many reviews on multiple RV forums that state positive use from 19.5 & 22.5 tires from almost every brand. That seems to be the consensus I've read from top name brands such as Bridgestone & Toyo to off-brands such as Sumitomo & Dynatrac. The biggest difference for RV'er seems to be price and maybe tread noise.
What you are asking for are people who have used all three brands you've mentioned and to rate them. Hope you find somebody, because I am curious too!!