Yeah, I think it's highly debatable that there's more literature and history in Latin than in Greek! In fact, I don't know how you would even measure that. If you look at sheer quantity of stuff surviving from the ancient world, including papyrus receipts from Egypt -- who knows which would come out on top. It probably depends on where you draw the boundaries of your "canon": Classical Latin trails off into Medieval Latin, Classical Greek trails off into Byzantine Greek, etc. Also, it makes a huge difference what you count as "literature," and whether "history" means "writings about history" or "writings with historical value."
In any case, we can probably all agree that both Latin and Greek are well worth learning