Alter Ego certainly has a lot of Mosaic in it. I don't think that rules out Julius having mosaic, but it most likely isn't used in large amounts. I swore that Julius didn't have any, but then though that I tasted some in it after drinking an Alter Ego on the same day.
I don't know about the aroma thing, when I pour a can of Treehouse IPA, the whole room smells like hops.
Unfortunately, I've never experienced that outside of any beers that I've brewed myself. Then again, I haven't been able to acquire any Julius since last year. The mule scene over there is unbelievable.