There is a succulent house here that has, I believe, every one and when I am there in front of them, they look different but I am happy with mine. It has been tried and true. Like you said, it looks different with different growing conditions. I have one in more shade, it's taller (leggy) and the leaves are long and skinny, lol
People always want to tell me, it is a different plant, even though I know I broke it off of the original and stuck it in that pot, LOL