Rte 90 or 14 through South Dakota

Hello. We will be driving from Mauston, Wisconsin to Palisades State Park, Sioux Falls, SD and trying to decide which might be a better route..... between taking 90 or 14 .... realizing 14 will be a bit longer but maybe providing a more "interesting" experience. Is 90 more of a highway type travel experience whereas 14 might be more to see, nicer driving experience (not so much traffic) more rural America . Thanks for any thoughts.
John
John