Sure there's a difference (and nice description, btw). Like I said, I don't think minion rules are bad, per se, but I think that they can cause problems.....like when Batman goes to rescue Commissioner Gordon and Aunt Harriet from Two Face's minions, only to discover than not only can the Commish take out minions as well as Batman can, but so can Aunt Harriet!
But you're ignoring the fact that neither Commissioner Gordon, or Aunt Harriet have Batman's Attacking ability.
Sure- if they hit they will kill a minion just as Batman does, but it's not in the same way or as often. It becomes that scene where batman is trying to rescue Aunt Harriet and Two Face yells "Kill them All- HAHAHAHAHAHAH!!!"
Batman rushes in and gets surrounded by minions. He's taking them out quickly and with basically one batsudo chop at a time, but then he looks over and sees Aunt Harriet being backed into a corner by a minion with a club- OH NO!!! He still has at least a round or two worth of minions to deal with, he can't get to her in time. Aunt Harriet is doomed! She's backing up and screaming, reaching for anything to defend herself with in her terrified state... Minion smiles evilly with that "You're dead now old lady!" evil minion smile... Batman is trying his best to get there....
And then at the last minute Aunt Harriet finds a pipe, or a pan, or a brick, and wildly swings it, and smacks the minion right in the temple.
Sure the minion died just as quickly as the ones fighting batman, but batman is surrounded by like 30 dead minions... whereas Harriet has one lucky shot.
It's also the scene where Batman is leading Aunt Harriet out of the warehouse, fighting minion after minion. He's beat up, worn down but soldiering on. Then he's distracted by something- looking the other way and a minion rushes up behind him with a spear/sword/chainsaw/vorpal rabbit- Oh no batman gonna die!!!!
But then at the last second Aunt May finds a pan... DONG!
Batman looks up at Aunt Harriet with that- "Whoa... didn't expect that one.." action hero look, grunts a thank you, and they move on.
The point is, ability to actually HIT the thing plays a part in how easy it is for you to kill it.
There are better ways to model Batman's prowess, IMHO, that don't cause this problem to arise.
Maybe, if someone finds them (and they don't add complications) then I'll take a look.
Right now minions give m ways to do things game wise, and ways to do things "scene wise" that I am enjoying.