Cookie and Sassy are my 4th and 5th Obedience dogs, so I have experienced the differences that personality makes quite a bit over the years. It’s put into sharp relief though when training two at the same time, who are at the same level.
Cookie is very precise, nails her fronts and finishes and is turning into a good little heeler. BUT, she is not all that motivated and gets bored easily.
Sassy has way more drive to work, but tends to either be moving too fast to be precise, or attempting to guess what I want without actually listening for it.
Both have their advantages and disadvantages and I’m not sure which one I’ll prefer competing with down the road. I suspect if I could better channel Sass’s energy, she will hold up better over long weekends of competing, but Cookie’s precision will help her win if I can figure out how to keep her energy for it up over longer periods (she will retrieve all day, so it’s more the mental energy than the physical that needs supporting).
Raising littermates has been such an interesting experience! But not one I would recommend for inexperienced dog owners.