well, to my eyes, the 6 bath process appears to:
be sharper
have better contrast
better color rendition and truer saturation
higher apparent D-max
clearer and brighter whites
I feel, but have no proof, that the results will be longer lived. that they wont fade or develop fixewr issues in future years
has a MUCH longer shelf life, both mixed and in concentrates. some of my original 6 bath chems, the reversal bath, pre bleach conditioner, fixer and bleach are all at least 4 years old and showing no signs of age giving poor results. with replenishment, 1st and color developer lasted over 2 years in original concentrates when I needed to buy more for usage.