Well, while trying not to call you an idiot during this post, I will explain why you would be an idiot if I were to call you an idiot.

First off, those are the only two sniper game series. Second, Sniper Ghost Warrior was a better game as far as you being a sniper, but it had much more bugs because, well, they weren't so rich to afford a bigger team. Sniper Elite v2 is more of a sniper game for the casual player, meaning even somebody like you can finish the game easily and won't get bored while doing real sniper stuff, such as sneaking around and waiting ( the game doesn't require you to do that, it's basically optional).

Also, I have finished Sniper Ghost Warrior on the hardest difficulty without much issues, you're just a noob.