In order to heal you have to be injured first. Durability keeps you from being injured in the first place. That's superior in my book!
But once injured, it's nice to be able to heal back up quickly.
Assuming it is powerful enough I would choose durability all the way. But then if I had a life threatening injury I would change my mind to healing factor!
I would go with durability. If there's anything I've learned from playing Battleships on Warcraft 3 it's that high regeneration can make you nigh invulnerable, but one big shot can outright kill you. With high durability, taking you down is a production. You can last longer, getting whatever job you need to do done without the hassle of regenerating your maimings.
With an enhanced HF you can still be hurt or even K.O.'d, you just get better at a much faster rate.
With enhanced durability it becomes incredibly hard for you to sustain any sort of injuries, so its less likely for you to be harmed or K.O'd in the first place.
IMO durability is the better of the two.
There are different rankings of healing factors and durability.
Enhanced Human: skin, bone, and muscle augmented to make it stronger and harder than human; impervious to injury to a certain extent
Enhanced Human Regenerative: skin, bone, and muscle retains human durability but body is able to heal near-lethal injuries by regenerating cells to a limited extent
You see, the EHR one grants you to stand up again, while the EH grants you to keep up while being damaged to a certain extent.In less powerful heroes, like Cap, who has peak human range durability or US Agent, who has EH one, they usually also as slightly faster than human healing abilities, but nothing near to the EHR, which is owned from being like Wolverine, Sabretooth, etc.
Metahuman: able to withstand extreme temperatures and pressures, and virtually all toxins, corrosives, punctures, and concussions without sustaining injury
The above ranking is the one the Thing is in, he withstood both ocean pressure and cosmic energy blasts.
Demi-godlike: able to withstand all injury short of a direct nuclear explosion
This is Thor ranking, despite he's depicted as metahuman durability owner, he has withstood things far worst than that level.
Demi-godlike Regenerative: able to heal all injury short of a direct nuclear explosion
The Hulk is in there, he can regenerate from most injuries if required and also withstood tremendous amounts of damage.
ummm, im going to be the odd one out here and say healing
why?
do you think being pummeled to death is the only way to be taken down?
heling factors should work on disease, poison, intoxicants, pollutants and all that other crazy stuff
if its a wolverine or hulk esque healing factor, I'd take that anyday before i took durability.
Healing also lets you do the "playing possum" thing, whereas being almost impossible to take down is going to draw a lot of attention to you 🙂
clearly the extremes at both ends will be pretty much equal, basically immortality
like, if its superman durability vs basic healing, well duh
in general though, id think healing factor will give you a better chance of survival than durability.
Not to mention it can be used more creatively in combat. Look at how mr immortal beat the wizzard guy at the end of GLA