LA Noire looks awesome and I can't wait for it. I love the setting and that it should have a great interactive story. I have high hopes for the game and hope it's good.
That said, I also love RDR. Western, free roam, fun. Yeah, I like that it has a story and I follow the storyline, but every once in a while I'll go wander around and do what I want simply because I don't feel like pursuing the story right now.
Both styles have their merits, but people shouldn't expect the games to be anything alike. Just because they're by the same developer doesn't mean they have to be similar.
Also, anyone who didn't know from the beginning that this would be completely different from GTA and RDR is an idiot. Maybe if the only research they did was watch trailers of it and not read up on it at all. Even then I still get a different vibe and you can tell it has a very focused story.
All in all, anyone deciding to buy this game based solely on the pretty graphics and just expecting it to be a new GTA/RDR deserves all the disappointment they get. I understand it might not be your type of game, but if that's the case just don't buy it. I don't like sports games or GTA, so do I go online and ***** someone made a game that I don't enjoy? No, I just don't buy it and I'm glad that the company makes money and stays in business and others enjoy the game.