Neighbor up the road has an Aussie Sheppard and a BC mix. The Aussie’s seem a bit more hyper than my BC was. I guess I must be somewhat (dunno the correct term) wanting a duplicate of my last girl.
Your BC must have been rather sedate for a BC. My sister-in-law had two BCs and they were HYPER. I suppose within any breed that some individuals are more/less energetic than the norm. I have watched teams of BCs and Aussies play flyball at dog shows, and although both breeds have a reputation for energy, the difference in energy levels seemed quite apparent to me.
If you do get another BC, it may conform to type, but it will not be an exact duplicate of your girl. Every dog I have known had a unique personality, and of course they are all sorely missed when gone.