the I sounds like the music you hear while on hold played from an am source; the II sounds like the music you hear while on hold played from a fm source, out of range of your fm receiver.
I have Red Rosebud II's and cornfedboy must be listening to a different speaker than I am. In my room, they are + - 2 db from 8kh down to 125 hz, they image like demons and throw a huge sound stage. Throw in a well-integrated sub and you've got a great system. Check out the review in the Absolute Sound. These are world class mini-monitors.