In my experience the only difference between a standard Aussie and a Mini Aussie (if both are bred well) is the height. Originally, Mini Aussies/MASs were just small end Aussies bred down. So, both are pretty high energy, one is just smaller.

That said, when I was still living with my parents, I was living with my own dogs, plus several of her MAS's and they're really not that hard to live with. Most of her dogs are perfectly fine being pets/light sports dogs and just having time out in the fenced yard to play.