Sean,
I played Aldarra four times and could never break 80, so that will give you some bad reference. Idaho Club is MUCH TOUGHER of the tee than Aldarra is, but once you get around the greens there is A LOT more going on at Aldarra. Like Mark said, if you screw up at Aldarra you will most likely get a bogey or double, but at the Idaho Club if you hit a bad shot, it is usually a lost ball and then ends up being an X. Idaho Club also played shorter for some reason, at Aldarra a simple 400 yard par 4 seems like it is 450 yards everytime. I like Idaho Club, but I would play Aldarra probably 7 to 3 if I had to split 10 rounds. As you can see I don't judge golf courses on how I play them, because I have gotten beat up every time I play Aldarra.