I think it’s also a matter of when it was done. I had the old kind with needles and scalpels and it was pretty rough. The newer procedures have a few benefits:

• No-scalpel vasectomy: a small puncture hole is made instead of a cut. The vas deferens is located, pulled through the hole, cut, and sealed. This method usually does not require stitches because the puncture is so small.
• no-needle” vasectomy: uses a special device called a Madajet, which delivers a puff of local anesthetic through the skin using compressed air, numbing the area before the procedure begins

I would think either or both of these options would eliminate most if not all of the major discomfort/pain issues.