A vasectomy takes about 15 minutes and I do them through a single “size of a grain of rice” opening.
A reversal, in my hands, takes about two hours and more commonly uses two incisions (3/4 inch on each side of the upper scrotum over the course of the vas deferens) and requires an operating microscope and microscopic suture.
I tell patients that it is a minor procedure, minimal blood loss or other complications, but it does take two hours to do. Bruising and some scrotal swelling is more common and there is a longer recovery period.
So…to the question…same structure (the vas deferens) different procedure.