zzokalj: 4GB RAM is a bit low, but it should only mean you will have to lower your graphics quality settings, no that the game won't work.
I'm playing on a laptop too, actually, I never played SPG2 on a desktop computer. First I had Dell workstation with 2GB graphics card, 8GB RAM and now I have Asus ROG with nVidia GTX 860M and 8 GB RAM.
Requirements for laptops and desktops are the same since it's the same hardware that goes in them.
As for Witcher 2, I have a frame rate problems even on this newer gaming laptop. That game looks fantastic, but the optimization is not the best. IF you managed to run Witcher 2 which is killing my Asus im medium to high details, then you should definately be able to run SPG2 which is working on 50-60 FPS in Ultra details on my laptop.
You probably won't run it in Ultra settings, mostly because you have only 4GB RAM, but it should be ok.
If anything won't work for some reason, please, send us e-mail with your log.txt and your save game (both in your game folder) to oliver@starpointgemini.com with a short description. But since game is really stable nowadays, without any serious technical issues, I think you should be fine. And I hope you'll like the game. Thank you for showing your interest in it.
NOW you're talking. Thanks for the reply, it's exactly that kind of comparison I was looking for.
By the way, I only said I beat the requirement of 4GB RAM (which I think you quoted from the recommended specs to play the game) -- my laptop actually has 6GB RAM.
Another sidenote, yes, this Ultrabook does suffer to run Witcher 1 and 2 -- as did my previous desktop and any machine I've seen them Witchers running on. It's playable, on minimum settings, but not glorious. Perhaps, as you said, the problem is optimization, and from these two games I got the idea CDPR doesn't really put much effort into making their games widely playable on any but the most powerful hardware -- and even then it's only VERY playable after the Enhanced Edition.