Hammer, below is a link to the Bose Forum (topic being a "Model 1 / Model 2 differences?" kind of discussion.
http://bose.infopop.cc/eve/forums/a/tpc/f/867107664/m/8041000005 (Hope the cut n paste link works).
Specs wise...
Model 1:
Weight
* L1™ Model I power stand: 35 lb (16 kg)
* L1™ Model I Cylindrical Radiator® loudspeaker
o Top Section: 14.5 lb (6 kg)
o Bottom Section: 16.0 lb (7 kg)
* R1 remote control: 0.6 lb (0.27 kg)
* B1 bass module (optional): 28 lb (13 kg)
Dimensions
* L1 Model I power stand: 26.0’’W x 26.0’’D x 5.0’’H (66 cm x 66 cm x 12.7 cm)
* L1™ Model I Cylindrical Radiator® loudspeaker (each section):
o Top Section: 43 1/8’’H x 3.5’’W x 4.0’’D (109.54 cm x 8.89 cm x 10.1 cm)
o Bottom Section: 43 1/2’’H x 3.5’’W x 4.0’’D (110.49 cm x 8.89 cm x 10.1 cm x )
* R1 remote control: 2.8’’W x 5.6’’D x 1.6’’H (4.0 cm x 7.1 cm x 14.1 cm)
* B1 bass module: 15.3’’H x 10.3’’W x 18.0’’D (38.0 cm x 25.0 cm x 45.7 cm)
Model 2:
Weight
* L1™ Model II power stand: 23.7 lb (10.7 kg)
* L1™ Model II Cylindrical Radiator® loudspeaker
o Top Section: 16.3 lb (7.4 kg)
o Bottom Section: 17.4 lb (7.9 kg)
* B1 bass module: 25.1 lb (11.4 kg)
Dimensions
* L1™ Model II power stand: 5’’H x 10’’W x 27’’D (12.8 cm x 26.2 cm x 69.2 cm)
* L1™ Model II Cylindrical Radiator® loudspeaker
o Top Section: 43 ¼ ’’H x 3½’’W x 4’’D (109.86 cm x 8.89 cm x 10.16 cm)
o Bottom Section: 43 3/4’’H x 3½’’W x 4’’D (111.13 cm x 8.89 cm x 10.16 cm)
* B1 bass module: 15’’H x 10¼’’W x 17¾’’D (38.0 cm x 26.0 cm x 45.0 cm)
(A bit of "specs overkill" regarding Weight/Height...... sorry, but you get the idea)
Hope that helps you in some way.