Very sorry about your loss. Been there as well and it sucks. Just reading your story (and seeing the video from the other thread contributor) brought tears to my eyes.
Just some advice, take it for what it is worth - as already mentioned, no two dogs are alike, even when the same breed. My wife and I rescued a dog after the one we raised from a pup was ravaged by cancer the year before. We went into it involuntarily comparing him to our deceased friend and the first few months were tough. He was very high energy compared to our last dog and constantly tested our relationship. We stuck with it and he learned our rules, as well as us learning what made him tick and what he needed. Fast forward four years and he is now an exceptional companion. He didn't replace our last dog though, and we still miss him.