Electrically they are the same point, there is ONLY ONE switch "run" wire coming out of the bulkhead. Depending on the year, that feeds ignition, field "blue" regulator "blue" power, the smog doo dads if used, the electric choke, all of that
On that note if he wants a relay, I'd cut the switched IGN1 coming out of the bulkhead, use the bulkhead end to key a relay, and put the other end on the load contacts.
