T460s with discrete Nvidia difference

[aau007]

Anyone knows where i can find some comparison and/or between the integrated and discrete models?

What benefits you get with the discrete model aside from the weight penalty?

What about the PCIe drive upgrade. I read from different places that if you have the SATA model, although the M.2 physical interface is the same, electrically it won't recognize a PCIe upgrade. Therefore, you can upgrade from SATA to SATA and PCIe to PCIe. Is that true? Anyone has personally tried the cross upgrade for a fact?