Hi Rich & Bill
It is quite possible that the speed difference is due to the Wireless adapter in the laptop. I have the same symptom in my Laptops. I'm using 801.11ac a real high speed wireless. However the laptops both have 802.11b wireless adapters in them that could be and most likely are causing the speed difference. If they Wireless N even then it would be less noticeable.
802.11b is a whopping 11 mbs - on a good day! You'd probably see a big improvement with a $15 N usb adapter.