What was more prestigeous for you as a fan?
Please only people who watched Big Nog's climb to gold in both organizations, not just UFC.
Pride just because the UFC belt was an interim championship, and he was easily considered the best HW in the world at that time. The UFC was cool just because he was later in his career yet he still won a belt, but Nog was not the best HW in the world when he had the UFC belt. He was in Pride.
He was much better in his Days as champion in Pride. He schooled everyone until Fedor. 
Really tough question. I feel like his most prestigious moments had little to do with championship belts 
Pride all the way, unfortunately
Can't say I disagree with anyone