These are great games to play simultaneously, or one after the other. They're both open world exploration-style games, but ER is clearly very combat oriented while DS is very exploration oriented, and they both play to their strengths very well. Plus they both have weird creative stories that are hard to fully understand until you've beaten the game, thought about things a bit, and pieced things together.

The combat in DS honestly feels kinda tacked on though and it doesn't really fit with the theme/narrative of the game. Thankfully nearly every encounter is a joke even on very hard, because you can easily perma-stun enemies with your rope; and all the BT enemies/bosses are kinda trivialized by blood grenades and/or the more late-game knife.