This is a quick benchmark of mobile GPUs that I did recently with my new laptops. CPU performance is matched to i7-4700 and 8GB RAM is given for all tests. Looking at the results, it was quite surprising to find that the Intel HD 4600 performed on par with discrete graphics on many tests, and even superior when it came to SolidWorks and TcVis where it outperformed GTX860M. Especially in TcVis the Intel graphics pulled off more than double FPS compared to nvidia graphics. And it operated much cooler, keeping the fan at medium speed whereas using nvidia graphics caused the fan to roar like an engine. I suppose that the Intel graphics are more capable of handling floating point calculations than Geforce,  similar to how Quadros work. Sadly the Intel graphics threw an error and crashed on Catia tests and showed poor performance on Ensight tests, but speculating about the superior performance it showed on other tests, I think choosing Intel graphics can also be a good choice depending on the type of work you do. In addition, if you are using laptops with switchable graphics you might get rid of a big amount of heat caused by the discrete GPU.