I just finished setting up a system in Southwest Florida for audition purposes with p8 ltd due to room size.The main difference is the ability of the larger speaker to fill a larger space.A writer for a major audiophile mag. just purchased the 8ltd, for this exact reason ,and uses them as his reference.If you require smaller size and have a room smaller than 12 by 15 it may be the perfect speaker.Don't misunderstand though the showroom in Sanibel is 15 by 30+ with vaulted ceiling, yet we are using one end of the room and the sound is outrageous.The inner detail and smoothness of the 2 speakers is the same and there is slightly more low bass,a few notes only,not different in sound volume and balance.I hope this helps some.