Perhaps unintentionally Carrick and Clapperton working independently in their own particular styles produced statues which, although quite different from one another, were true to their subjetcs.  Clappertons rather aristocratic figure fits with the Royal Bruce, while Carrick's figure, almost brutal by comparison, was in keeping with The Wallace who has always been seen by Scots as the true man of the people.  The Bruce stands apart from the local stone in a way that Wallace does not.