Ive never heard the hugo but people who have both are saying that the hugo is more analytical and more detailed than mojo. It could just be the difference in sound signiture that they're hearing but a greater tap length should account for more depth so if the mojo does indeed have more taps in theory it should be "better" than hugo. But only John and Rob know the tap length.
There are design differences in Mojo and Hugo beyond tap count. The noise shapers and number of elements in the WTA I think. These differences probably all contribute to the difference in sound signatures.