Quote from shaggyQuote from PhrekyosNope. HP is still greater for Rare packs, even in total. And besides, that's just numbers; you can test it by playing and see that it takes longer. With AoE attacks you can finish off the 3 or 4 Champions in less time than the Rare leader and the minions together.
I don't recall saying that rares didn't, generally, take longer to kill. Of course they do due to how things work in Diablo. What I did say was that being able to burn down the relatively-weak minions (thereby easily reducing the number of plagued puddles, arcane beams, completely eliminating shielding, etc.) provides for a far different tactical approach.
I know that some people will only measure "difficulty" in terms of how many seconds it takes to kill a monster, but that's a very one-dimensional approach that I simply don't believe in. I'm sorry that you had to take 10 more seconds to kill that rare guy, but that doesn't actually mean he's harder. The tradeoff was that you got to completely eliminate all threats from the OTHER guys far faster thus making it a much less-dangerous fight.
You said roughly the same amount of HP which of course is not the case. And you implied that the groups should take roughly the same amount of time to kill.
Minions have a little less HP than Champions so it's more or less the same in terms of dispatching them. And who said anything about "difficutly" and time being a major factor?
But since you brought it up, yes, time IS a factor in difficulty because the longer you spend fighting mobs that can potentially kill you the more likely you are to die due to a mistake, unfavorable circumstances or random lag spikes that can screw you up.
I could go on but this is fairly pointless to discuss so I'm not going to continue.