If we exclude their respective Tier 0s, DC's cosmology is far and away the stronger of the two.
They currently have at least 9 different 1-As (most of which exist thanks to Vertigo), and at least
one of those 1-As is so high on the food chain that he makes others look like a bad joke. They also have
a High 1-A who's pretty much the canvas for everything that exists both inside and outside of reality in their verse.
Meanwhile, Marvel has exactly
one 1-A who's barely above baseline.