Like are the odds of finding a rare ID'd 2/20/2 diadem same odds as gambling one?

I guess gambling has lesser chances because its not always a rare item sometimes its blue and unique?

If you have a fast way of earning money(gold barb) gambling is extreamly usefull for getting good diadems.
Just remember its RNG, i have a friend where every second diadem turns out great 2/20/nice adds... But he has shown extreame ammounts of luck before irl as well xD Only person i have seen winning 2 man vs 34 in risk board game.