I used my former landlord's yellow Model 1363 in the '90s and thought it did a fine job on an oriental rug, and it wasn't too heavy. John (tig21er) mentioned in a reply above that its weight (24 lbs.) was the same as a Kirby Sentria; so you probably are not a Kirby fan either. I have a feeling that Electrolux's main upright direct sales competitor was Kirby, so the company likely felt compelled to make it comparable in weight to the Model 2CB/Classic III with a few extra features such as the 4-wheel height adjuster, magnetic clutch, disposable bag, and bag light indicator.
It's interesting that the L-Shaped cleaners were not equipped with the bag light indicator until the Lux 4000; would that have included the lower-tiered and commercial ones, as well? The cost savings must have been substantial enough, or it wouldn't have been left off for that 10- to 15-year period.
I didn't realize until closer inspection of the brochure above that the yellow Model 1363 used the same white hose as the 1205/Jubilee and 1401/Super J. I wonder if the other rectangular-shaped upright series used the same woven hoses as the cylinders, too? By the way, does anyone know why some of the later machines in the series were designated with an 'E' suffix (e.g. 1451E)?
I saw in another thread that the 1979 Olympia One owner's manual mentioned a commercial version; however, my 1981 Olympia One and 1983 Silverado manuals do not. So, apparently the Model CB won out after a year or two.