The difference is Russell activated what is a Kingdom of God warning to the sovereigns of planet earth, from the Bible in the Lord's own prayer plain as day, that must in time come to a conflict as divine war for planet Earth. And it is really pretty apparent what the main theme of Christ's own ministry was about as anointed King of that final world and universal power.
Bethel, the WTS and Governing Body, on the other hand, joined the United Nations. There is nothing in common between a true Christian Kingdom message and Bethel of today or their rogue, self appointed and self approved Governing Body of celebrity distraction and spiritually criminal activities. (2Thess2:1-4);
Russell came from a time of complete occultic underpinnings of religion and government, so it was a first pass at a divine message of impending Kingdom of God conquest that will get a final reminder in time, prior to that Kingdom come, as the final UN world government also goes into completion activities (Dan11:42-45) through this final series of world collapses to ensure full globalization (Rev16:13-16), that must activate a literal Daniel 12 final fulfillment as Daniel 11:42-45 leads into Daniel 12 "during that time" coming up over some years.
Then the two completed KIngdoms shall meet to settle the issue permanently. That message is what Charles Russell led the way to a final awarenss prior to game day. The Governing Body are now the main diversion from that message's validity.