Assassin's Creed and Dishonored.
Both games about assassins. Both with a bit of sci-fi (and/or Steampunk in DH's case) thrown in. Both with incredibly obvious plot "twists" that can be seen coming six miles away.
-AC3 leaves you with a great deal of choice as to *what* you do, while Dishonored's counter-offering is a great deal of choice in *how* you do it.
-Dishonored keeps many of its cards hidden close to its chest, with inobvious clues, no mini-map (though a spell can achieve some level of this), and half or more of its trophies hidden. AC3 just dumps out markers and objectives in glaring detail.
-Dishonored's guards are more tenacious when their suspicious are roused, and credible threats. Meanwhile AC3's are generally ineffective, but can at least be bothered to look up. AC3's behave a bit more plausibly in terms of reacting to your demonstrations of superiority as well.
What I'd like to see from one to the other
AC 3: Take Dishonored's open-route approach, and multiple methods in hand. Leave a bit more of explanation out, and tone down the super-killer aspect a bit.
Dishonored: Third-person view would be nice option. Guards with a morale system that don't all bulldog onto the guy who just sniped their leaders face off with an exploding bullet would be a nice touch too (Particularly the "Common" guards in terms of using Outsider powers and after you eliminate their paycheques in the storyline. Being able to trade in my sword for a non-lethal bludgeon would be handy as well.