From this decision, it seems there is little difference, hence much duplication.  Duplication in the legal malpractice world means dismissal of causes of action, which is what happened here.  Justice Edmead bought none of defendant (counterclaimant’s) arguments.  She dismissed the cause of action in Brinen & Assoc. v Krippendorff  2016 NY Slip Op 31803(U)  September