Working lines do tend to have higher energy and drive.
They sometimes have a smaller frame as well.
American show lines may have less energy and drive, most likely because they have not been bred for their work ability (other than maybe herding) in so long. Of course this doesn't go for all.
It's usually the American pet lines that often get 100+ lbs.
Black/Tan, neutered male
"American Pet Line"
Varick vom Haus Jeffery
Dark Sable, intact male
DDR/West German Show Line