YES.
Harriman is a good consistant RIGHT back. His form dipped for a couple of games after 7 weeks of Saturday/ midweek games in different positions.
Mils is a good attacking WING back who can set up and score goals.
Whilst I've watched every day Mills has played, I cant recall being overly impressed. Seems to lack pace for a wing back, something Harriman seems to have a fair bit of.