Question: what's the difference between the comic book series Star Wars: Darth Vader and Star Wars: Darth Vader: Dark Lord of the Sith?

My bro's birthday is coming up, wanna get him some Vader stuff and was looking to the comics cuz I heard they were good. But apparently there's a couple different ones? What's the difference, and which one is better? via /r/StarWars https://ift.tt/g7SZUu6