this is a journey that depends on which side of the M25 that u live!
if u live anywhere near to the M20, then u will get to me in sittingbourne quicker.
people have found that going "against" the flow of traffic, ie not towards the M25, is easier than fighting onto the rush hour traffick.
the mileage doesnt really give you an accurate tjourney time.
debs is the one to ask as she has also been to both.