I don't see #'s 3 and 4 being any different at short or medium range. If he is going to have better dice at short range, he is likely going to have better dice at medium range as well.
The difference comes from an older thread where someone ran the probability. Adding dice yielded better results then upgrading dice. So something like adversary 2 will have a more noticeable effect on success and advantage totals at short range (where it adds dice) then it will at medium range (where it upgrades dice). Its one of those little details that makes a big difference when crits and special qualities need to activate.