Opposite ends of the spectrum.
Or simply interpretations of strong bass, and extended bass that vary from person to person as almost all aspects of sound do.

My WAG is that you are conditioned/trained to listening with a subwoofer in system, perhaps even augmenting VLF beyond a natural or intended level. I'm not aware of any vintage 2-way system designed for or capable of that type of reproduction. In a nutshell, you're hearing/judging the AS-101's with contemporary "bass heavy" pre-conceived expectations.

Just my .02...............................