The only differences between the two models are that the 0862XD1 has a 5400rpm drive rather than 7200rpm, and the 0862XC3 has switchable integrated HD 3000 graphics as well as the GeForce 555m that's common to both models.
My questions are:
1) Does the drive speed really matter? I'm not super-picky about the drive rpm, but if it's makes a noticeable difference I'd like to know.
2) Does having the integrated graphics alongside a dedicated card help? I know folks switch to the integrated graphics to conserve battery, etc but I also know people have reported non-graphics issues that are somehow related to the switching (USB ports acting wonky, etc).
drive speed does matter, you will notice it if you plan to transfer alot of data to and from the hdd. also most times you will find laptops use the slower speed drives to extend battery life. u did notice they were Refurbished. that price seems a bit high for a second hand product.
Just get the one with the 7200RPM drive since they are the same price. Otherwise, all specs looks to be the same.
The only problem I came across regarding switchable graphics is that the nVidia GT 550m in my Lenovo Y470 "disappeared". Windows 7 could not detect it. The only way to get back use of the GT 550m was to restore Win 7 back to factory settings. Simply re-installing the drivers for the GT 550m did not work.
In the research that I've done, it seems to be an issue with the nVidia GT 5xx series that causes this not very common problem.