Specifics on the updated engine?

[RaideX]

this may be a bit off topic but is the game with the updated engine really that demanding? I mean yeh, i don't have the best graphics card to play the game (AMD HD 6450) but i've played TDD really well with my PC.
Because i got told that i am just able to play AMFP on low settings with the specs i have.

Is the game really that different from the Source Engine Games? I mean i can play almost every new Source Game on High Settings with around 30-50 FPS (Portal 2, Counterstrike: Global Offensive).

You have to know that i really love the Amnesia Franchise and i'm super exited to play Pigs but it would really s**k if i would be forced to play it on low settings because i'm afraid that that would change the game experience quite heavily. :<