some guy on craigslist said he bought a blue jr and regrets it because his princeton chorus sounds better, is this by any extent accurate?
Different strokes for different folks dude.
Why do some people like Les Pauls and some like Strats? It's an individual thing. You have to listen to both yourself.
Blues Jr is based on the Tweed era fender tone which has it's tonal focuse in the midrange. The Princeton chorus is based on blackface era amps which have a wider frequency response and significantly less midrange. Which is better depends on the music you want to play.