I don't think Russell and Rutherford can even be compared. Rutherford seems to have had some deep seated mental issues, especially after WWI. When somebody builds (or causes to have built) a fancy mansion for themselves and claims that he's just house sitting until the "princes" arrive, even the most strict Watchtower adherent would question their mental stability. The indication that he seemingly alienated his wife and son is also very telling.
Russell may have been disillusioned, but Rutherford was a full blown kook.
This, of course, is not based on hard research.