Breeding those two dogs will be a pig in a poke. You could just as easily get the worst attributes of both dogs as the best or something in the middle. Regression towards the mean is usually quick as within a couple of generations. So an elite national champion dog will usually within about two generations have offspring that are very average even if breed to the same breed.
The other thing with crossing two different breeds both dogs could have great hips as one example but if the pups inherit the breed with larger hip sockets but the leg joints of the smaller one the pups could have sloppy fitting joints. You can mostly prevent that with sound dogs of the same breed but when you start mixing genetics anything is possible.
To get predictable repeatable pups takes a dedicated program of line breeding over generations with an occasional outcross (to the same breed) for genetic diversity and to further refine desirable traits. A kennel owner that can stay completely objective in evaluating a whole lot of dogs and only selectively breeding to few.
Having said all of that, they’re your dogs. As long as you know that you can line up good homes for all of the pups have at if that’s what you want to do. You’ll probably get a good house dog but I wouldn’t have high expectations for a super dog with the best traits of each. I think you would be better off to find a dog of the same breed with similar qualities to the dog that you already have to breed to and you could probably sell the pups to recoup some of your time and money.
