We have seen comparisons between newer versions of these OSes on NG Amigas. How about some benchmarks between MorphOS 1.4.5 and AOS 4.0 on a classic Amiga setup? Who's up to the task? 
Those OS versions range from "outdated" to "obsolete" today, and the Classic Amiga's even more so.
A new comparison of *current* versions made on the aging Pegasos 2 would be much more relevant IMHO.