Originally Posted by Kilter
I would say it would depend on the lines of the dogs you're looking at. I've seen some very soft aussies and some hard border collies, and all size ranges in both. I'd guess aussies from the show lines are going to be a bigger dog as a rule.
I've noticed this, too. In fact, I never even considered aussies until I met several obedience aussies and they are so different from the giant, fluffy show/pet aussies I had known before.
With BC's it seems like the American show lines are smaller than the working or sport lines. I imagine the show BCs are less drivey and focused than working lines as well. I need to meet more border collies!