Both forefoot varus and forefoot supinatus can look the same, but they are two totally different entities. By definition they both are an inverted forefoot when the rearfoot is in its defined neutral position and the midtarsal joints are maximally pronated.
Forefoot varus is a fixed osseous position and forefoot supinatus is a soft tissue contracture.
Forefoot varus is a cause of abnormal biomechanics of the foot and forefoot supinatus is the result of abnormal biomechanics of the foot.
Forefoot varus is congenital and forefoot supinatus is acquired.
Forefoot varus is fixed and cannot be reduced; forefooot supinatis is more flexible and can be reduced.
Even though they look the same, there are substantial differences between forefoot varus and forefoot supinatus.