I used to attend lots of Mopar shows and even served as a club officer, but have cut back since most shows are now populated by either racers who laugh at my slant- powered car, or modern cars still smelling showroom fresh. I can see them in an air conditioned showroom without having to slather myself with sunscreen and pay $20.
I got racing out of my system years ago when I became bored listening to hours of conversation dedicated to cutting another tenth of their ET, and while modern cars are functional they are sorely lacking in personality. Flashing LEDs, 100 hp amplifiers, and catalog customizing do nothing for me. Creative customs I like, check book show cars I don't.
I attend a couple of open shows each year that are run by non-car organizations, because they don't have an agenda beyond getting lots of cars. When attending some open events, I've been relegated to parking my Mopars in mud,while the glut of tri-5 Chevys are on blacktop, or sharing a row with four wheel drive trucks, or having the better parking spots blocked off until late arriving Chevy drivers show up. That's fine, but not for me.
Most importantly, the older I get the more of a loner I become, and the less bad music, bad manners, bad habits, and bad language I can tolerate being around. Let others do what makes them happy, but I'll pass.
As to the original question, I don't know what makes Mopar drivers different, but I've owned and driven nothing but Mopars since 1955 and that makes me different from even the "mostly Mopar" guys.