I could have been one of those people, but I'm not prepared to assert that "Straight Ahead" is better. I just like it more and listen to it a lot more.
"The Blues And The Abstract Truth" has long been a classic album. I've owned a copy for almost 35 years and can play it in my head. I came upon "Straight Ahead" somewhat later, and I was rather surprised, actually, when I eventually grooved with it even more than with its much more popular and heralded predecessor (Both albums were recorded within a week or two of eachother, as I recall).
The Nelson-Dolphy front line (sometimes hand-in-glove, other times displaying piquant contrasts, always sympathetic-approaching-telepathic) is backed by Richard Wyands, George Duvivier, and (again) Roy Haynes; all play beautifully together. The tunes and solos are just as compelling to me, the atmosphere warmer and more intimate and soulful (to my soul).
I've never warmed up to that other Nelson-Dolphy collaboration, "Screamin' The Blues", BTW, FWIW, etc.