When I stated not very loud - I mean compared to my 5e3 Deluxe - considered 12-14w 6v6 push pull - through the same speaker.
The Princeton is dubbed 15w, 6v6 push pull with similar gain stage / tone stack, same cathodyne PI.
Very similar; transitional from tweed to blackface in the Deluxe is cathode bias while the Princeton is fixed bias.
The Princeton is a single channel using 1 of 4 triode for the trem driver; the Deluxe uses 1 of 4 for the 2nd channel input.