Verified answer

I prefer Marvel over DC, but I do like characters from both companies. They both have their good & bad points. However, my favorite superhero is Spider-Man, followed by Hulk, so you have to make mine Marvel.

As for who has more characters, that would take an exhaustive bit of research into how many characters have been created for each company. Then, if you're going with the active roster only, you have to look to see who is no longer in publication & what characters are currently listed as dead. So, let's make it easy & say they are close to even.

Finally, I wouldn't say most characters in Marvel have healing factors, but several do, & some have accelerated healing to greater or lesser degrees than others. Characters like Hulk & Wolverine have nearly instantaneous regeneration. Some characters, like Spider-Man, can heal much more quickly than normal humans, but not as quickly as the previously mentioned characters (ex: Spider-Man has been known to heal from injuries like broken ribs after resting for a day). Then, there are more that may have decelerated aging, but don't have accelerated healing, like Nick Fury. Then, there are still plenty more who have no accelerated healing at all. Many characters fall into this category, & I would say more do than those who have healing factors.

Marvel

Let me give you a definate answer. If this battle were to take place, it would be a stalemate. why? because each univers/multiverse/Omniverse(not going to get into it) has a god, representing the writers of the comics. This basically means that what ever the writers desire is fair game. Though I am a huge comic fan/nerd, and I have figured who I think would win(With their current roster) in my opinion. Each company has their carbon copies of each other(as stated). For example: hawkeye-Green arrow, Ironman-Batman, Superman-Hyperion(They have the EXACT SAME POWERS, you can research yourself), and the list goes on. Though in an all out war, I m sorry but all of your favorites don t matter. We have to focus on the godlike to the Nigh-Omnipotent characters. To put it simply, i love both companies, but I belive marvel would win. I love the characters of DC AND Marvel, but they have STUPIDLY overpowered characters. To the point that they are boring. For instance, pre-retcon(Retroactive continuity change) Molecule Man can control, alter, and project EVERY MOLECULE IN THE MULTIVERSE-_-. Lets not even talk about pre-retcon beyonder who is literally God. For those of you who don t understand literal Omnipotence, it means that you can do LITERALLY ANYTHING. He could choose the delete the entire Marvel, and DC universes at the bat of an eyelash. He also has Omniscence, which means you know everything that has ever been known, and will ever be known this means he already knows everyones weaknesses. Also backed up by time travel, reality warping, cosmic, and astral projection, immortality, invunerability and just about every stupid OP power out there. Though let me say again, These kind of characters are boring to me, as why do you wonder why batman, superman, ironman, captain america, spiderman, etc. are so popular? They can be beaten which is suspenseful, and interesting! Now don t get me wrong, DC has some crazy characters to, like LUCIFER AND MICHEAL THE ARCHANGEL THEMSELVES xD. They just don t stand a chance against characters that can destroy multiverses.

Personally I like Marvel more.

DC has less memorable characters, and I find many of them are unoriginally and silly.