I always see people comparing Titans to other major lore characters or Old Gods to other major lore characters, but never Old Gods to Titans, and from all lore I've read, it would seem that Titans are a whole lot stronger, but I still see people refering to Old Gods as the strongest beings in the Warcraft Universe.
So which is it? Titans or Old Gods?
I'd also like to hear your reasoning and arguments for it, simply saying "Old Gods" won't convince me.