It's a little bit of both, diergray.
It's really hard to nutshell the gunslinger series. It's kind of an old fashioned western wrapped with a "day the world went away" feeling to it. It has zombies, vampires, witches and warlocks (those are all very loose terms I using). There some good character work in the Drawing of the Three. Some interesting background stuff in The Wastelands and even a gritty western/ love story in Wizard and Glass.
If you've read a Stephen King book from his last 10 years or so you've had glimpses of the Dark Tower series. Travellin' Jack gets a taste in The Talisman and The Black House; there's a mention of it in Insomnia; I'm sure there's more I just can't remember.
I realize I'm babbling so I'll stop; I'm just a big fan of The Dark Tower books
