At this point, your best option is to consult with your computer manufacturer as they are the only ones entitled to provide you a list with tested, approved and certified adapters that would be compatible with the system you have. Please check the link below for further information on this matter.
http://www.intel.com/support/wireless/wlan/sb/cs-011644.htm Intel® Wi-Fi Products — Regulatory Information Regarding Hardware Installation or Upgrade
We are an OEM that uses the 6300 in our units. I was looking for guidance on which current module would be the closest to the 6300 module.
I understand the regulatory implications as we would be re-testing our existing units with whatever we decide to use as a replacement.
In this case you may want to take a look at our product and specification website: http://ark.intel.com/# @NetworkingProducts ARK | Your Source for Intel® Product Information and look and make comparisons among the products and see which one would best fit your need.