I am sorry for the late reply, it seems your question was in the incorrect queue and was recently moved to the Wireless Networking Communities.
If you plan to upgrade the Wireless adapter in you Laptop, the Computer Manufacturer Support is the best source to let you know the correct replacement and how to obtain it. Intel does not support custom integration of these wireless adapters.
Some PC's are designed to use specific adapters and may not work well with unsupported devices. Installing these adapters in an unauthorized system may be illegal.
To clarify your specific question, the difference between the two adapters you mentioned is that one is a low power model and the other uses standard power:
Intel® Dual Band Wireless-AC 7265, 2x2 AC + BT, M.2, Low Power
Intel® Dual Band Wireless-AC 7265, 2x2 AC + BT, M.2
For more details you can review the Intel® Dual Band Wireless-AC 7265 ordering information and specifications: