>>83057241DC publishes better comics more consistently.
Most of the go-to comic stories are DC.
When people suggest comics to people more often than not you hear books like Watchmen, TDKR, Kingdom Come, New Frontier, Sandman, or All-Star Superman. Just to name a few.
DC tends to find new writers that make them big sellers too. It's why every writer DC finds has to be ripped away fast. Because they don't want DC churning out another name-selling author like they did in droves during the British Invasion, Johns, or recently with Snyder (Love him or hate him Batman never dipped belong 100,000 when he was writing it. That's a big feat.)
A lot of writers also do not sell the way they did at DC when under Marvel. Waid's quality aside he's not the big draw he was when at DC. Nor were Rucka, and Dixon at Marvel. One could argue Brubaker and Busiek are to some degree but their DC stuff is often held in higher regard by fans.
Marvel currently publishes books that are popular in the now, but are rarely remembered in the long haul. Especially not the stuff being published right now.
DC's a huge threat and the only thing really holding them back was the fact that WB itself was totally inept at handling their properties outside of comics, and the fact that the reboot instantly turned both readers and non-readers away by principle. Also due to WB/Time Warner as a whole operating like a clusterfuck they really don't have the press-backing power Marvel has right now with the tight-ship Disney.
