I am the other poster that at times disagrees with MrsJungelow
at times.
I have collies and working cockers. Both dogs work, the collies work the sheep and my paid work is scent work with the cockers.
The collies are wayyy easier than the working cockers. I can say this I have both, the collies are wayyyyyy more intelligent.
The collies are easily happy with brain work and some exercise (here I do agree with MrsJungelow). The collies also are very people dogs, they choose to be with me and work with me. I am all important, other dogs, environment, people even sheep are less important to them.
The working cockers drive to hunt and scent is huge, it is their life . I have had to work harder to get the bond it is there but never quite like with the collies. The cockers will work and work and work at 100mph, they never go in a straight line. Interestingly the working cockers have had more separation anxiety than the collies and this had to be worked on to start with. The energy of the working cockers is fantastic. Scentwork is hard hard work, we all have several dogs to let them rest, the cockers do not agree with this and would literally scent for hours if they could.
My "breed" is the collie. The dignity, empathy and intelligence of the collie for me is unbeatable.
The Working cockers are great fun, happy, busy dogs the friends you want to go out with but sometimes need a weekend off
I love them for work but proabably would not have them as a pet having had collies first.
MrsJungelow I think in this post we agree 
Ephigenia get a collie - some of the bitches are tiny.....