It's harder to align entire brands, but i can draw some comparisions with specific models.
To me, the JEMs are like the last-generation Lamborghini Countach. Built for performance, but the styling kinda got out of hand, with too many wings, fender flares and vents punched in the body.
Strats are like an old Datsun pickup truck. Built for utility, but easily souped-up to race across Baja. They take a beating and never die.
The Les Paul... hmm... Maybe more of a late '70s Ford Thunderbird. A little bloated and overweight, and kinda strayed from the original design goal, but riding on the success of the name.
PRS is sort of like a Corvette. Young guys like 'em because they're great performers and can look pretty hot. Older guys like 'em because they're in their midlife crisis mode, have too much money, and think that buying one will make them popular with the ladies.
Steinberger is like classic Porsche to me. They're highly engineered, and they single-mindedly stick to their principles, no matter how "out there" their ideas are.