Well Sir Terry Wogan can sometimes be funny (although on Eurovision he tended not to be imo) but Graham Norton I always find funny, maybe cuz of his camp humour lol. He may have got his facts wrong but Graham is an actual fan of the contest and cares about it - that's why he keeps saying about countries giving us points! Terry however may like Eurovision but he's not a fan of it anymore, that's why he quit it. Sometimes he went a bit too far as if he hates Eurovision and then it's like, well why bother doing it?
But I respect your taste for preferring Wogan, I know many did, including my Dad lol.