John Wall is supposed to be the best point guard in the nation, but he might not even be the best scoring guard in his own conference. For all the buildup the 6-foot-4 guard from Kentucky gets, one need look no further than mini 5-foot-9 guard from South Carolina to find a better pure scorer than senior guard Devan Downey. Who is the better overall player? That might be the determining factor in Tuesday’s matchup in Columbia, S.C. when Kentucky, now the nation’s top-ranked team and only undefeated squad in the nation, takes on South Carolina at 9 p.m. at Colonial Life Arena, where the Cats were blitzed 77-59 last year.