Chicken 6, The two figures that you have are both correct.
Your 'maximum glide' distance would be 65kts clean because that gives you your best l/d POSSIBLE. The 'best glide' is the speed that you should fly once you have your flaps set at 10 to achieve the best l/d ratio for THAT CONFIGURATION.(I am assuming that in your a/c ops manual it states there being a max glide and a best glide speed).
I'm not too sure but I think it gives you the performance graphs for these calculations in the back of your ops manual and it may make it clearer once you have looked in there.
Cheers