The performance is very similar, stick with the cheaper option, it's not worth paying extra for a laptop for anything below a 630M GDDR5 if it has an integrated intel igp like that, perfectly capable of matching the lower solutions for nvidia/AMD laptops.
That's why I told him to put the laptop model, to see the specs, not just the graphics to see what CPU and if the price increase is for the card or because it comes with better hardware, also that it would be 4000 there could be a few.
There are also 500 series in nvidia that could be worth more and be cheaper, or maybe other newer AMD ones.