Another voice of agreement.

Here's the thing: just because you get another mixed-breed, the same mix as you had, there is no guarantee that the temperament will be the same. None. That's simply how genetics work. You may end up with something similar, but you may end up with the exact opposite. The new dog's personality may swing to one breed or the other, or be a mix of both. There is no guarantee.

There is no guarantee even in purebreds. My boys are an example. They are litter-brothers, but have very different personalities. Cooper is more outgoing, while Manero is a typical Borzoi, and more reserved with strangers.

And here's another thing to consider: any breeder who is intentionally mixing breeds is not a good breeder. Period. There is no need to mix breeds intentionally, and there is no excuse for anyone to do it.