Personally, I don't see much difference between Marvel and DC. It is clear that they are both only catering for one small section of the market.
I do think you can draw a distinction between DC and Marvel on three things.
1. Fewer company wide "event" crossovers. DC hasn't had one since Blackest Night in 2010.
2. Fewer rebooting of titles with new #1.
3. Publishing non-super-hero stuff like G.I. COMBAT, ALL STAR WESTERN, SWORD OF SORCERY, etc.