“ Whether suits under the two statutes are distinguishable for purposes of determining the time at which a cause of action accrues warrants further exploration by the Court of Appeals. Further attention should also be given to the question of why a § 303 cause of action has sufficiently accrued to bring suit as soon as the plaintiff suffers damage but has not sufficiently accrued to start the running of the statute of limitations on the damages already suffered and for which suit may be but is not brought. ”