Penns, and especially Wilsons, are fantasy balls.
They bounce stomach high on my first serves. They bounce higher on my second serves....at the backboard.
Dunlops barely get to thigh high on firsts, and sometimes don't make the backboard after it's initial bounce in the service court. That is a reality ball.
I can almost sustain a rally with Dunlops.
Wilson and Penns, it's one ball winner or loser.
I play on cement courts painted, air temps around 55-60.