That comment raised my eye brows as well… I used to love the Maxfli revolution, but have no idea it’s spin profile… I’m not sure there are any still around that haven’t degraded significantly in quality.
From what I have read, the “ideal” golf ball would be a hollow sphere with all the weight on the perimiter, and I think modern ball design reflects that…
What impact liquid cores have on spin is probably a question for someone who has a phD in fluid dynamics. I don’t think Phil has finished that class yet.