Mapquest Drives Faster than Google

Looking for the best route for the first leg next week’s roadtrip (Minneapolis to Rapid City), Jen and I checked out MapQuest and Google Maps and found something very interesting:

MapQuest drives across South Dakota at 71 mph
mapquest mn to sd 609 miles, 8 hrs 37 min

Google has the cruise control set at 61 mph
mapquest mn to sd 614 miles, 10 hrs 3 min