Doesn't matter. Whichever one you buy you'll love it so much that you'll go out and buy the other one
Also recommend playing Aria of Sorrow before DoS. It's not nessasary, they explain the gist of the major plot points anyway but some things make a bit more sense when you've played the prequel.
Also recommend playing Aria of Sorrow before DoS. It's not nessasary, they explain the gist of the major plot points anyway but some things make a bit more sense when you've played the prequel.