Half-Speed Masters - are they worth double dipping?

The half-speed-mastered LPs I have from the '80s (MFSL and CBS Mastersound) do sound better than the conventional LPs.  Of course, the MFSL were also pressed with virgin JVC vinyl and made from the original master tapes, so that also helped.  If anything, I thought the bass was fuller on the MFSL than on the conventional LPs, so I'm surprised at the comments that bass is negatively affected.  I wonder if this is just a relative perception because higher frequencies are enhanced, which may result in weaker-sounding bass.

I just compared my MFSL of Grateful Dead's American Beauty with the 24bit/192kHz version on Qobuz.  Cartridge is a Benz Ruby 2 in an Eminent Technology ET-2 linear-tracking tonearm; streaming via my Bluesound Node 130 upgraded with the Teddy Pardo linear power supply.  I carefully matched the volume with the smartphone BluOS app while playing both sources simultaneously and switching from one to the other

The most noteable (and only significant) difference I heard is the higher bass levels on the LP, which is consistent with what I've heard on the '80s MFSL LPs using various playback setups. 

Tangentially, this says something for the quality of the Node 130's streamer and DAC that it can match the sound quality of a $7000 (in 1990s prices) analog rig.  (BTW, the Ruby 2 is one I've recently acquired from a collector/dealer of high-end cartridges, and it has less than 100 hrs. play.)

I plan to do more comparisons, perhaps with my MFSL LP of Karajan conducting La Mer and Bolero (which is the later EMI/Angel version, not his beloved 1964 DGG recordings).