Any workers’ compensation judge who retires in accordance with the provisions of § 28-30-15 and § 28-30-16, and who is subsequently assigned to perform services in accordance with § 28-30-15 and § 28-30-16, and when so assigned and performing that service, shall receive in addition to his or her retirement pension the difference in pay and fringe benefits between what he or she was entitled to receive under § 28-30-15 and § 28-30-16 prior to exercising his or her options under § 28-30-17, and what a judge with comparable state service time is receiving as a judge of the workers’ compensation court to which he or she is assigned.