Thats like saying Greco and Freestyle are both Olympic wrestling styles, how different could they be?
UWW doesnt score pins, Combat Wrestling does.
UWW has closed guard, Combat Wrestling doesnt.
UWW scores reversals, Combat Wrestling doesnt.
UWW doesnt have standing escapes from submissions, Combat Wrestling does.
UWW and Combat Wrestling restart positions are quite different- in Combat Wrestling, wrestlers are always restarted from standing position.
Yes, they are quite different.
And the only thing a guy needs to compete in Combat Wrestling international event is to win a bracket in his national team. If there isnt a country representative, the athletes are free to enter directly.
Combat Wrestling provides sponsorship help for accommodation/ travel expenses, based on country ranking.
FICW is most probably the easiest organization to get in contact with the governing body and get a full answer to all your questions