Believe me my friend, Dark Souls is far more easier than Demon's Souls, you'll understand what i mean, when you get far on the game.
Actually I'm finding Demon's Souls to be easier for me (especially taking the Dark Souls DLC into account), but that's probably because I used the royalty class in the first game.
But that's also one of the things I love about the Souls games: there are so many varying levels of difficulty between players depending on how their characters are built. Like how lots of people had trouble with Ornstein and Smough, and I beat them with relative ease, and without power-leveling (and I'm not a master of the game by any means). But at the same time how I seriously struggled in places that were generally considered somewhat easy, like Tomb of the Giants.
I absolutely love the Souls games.