I can't speak to your specific breeds but I can talk about my QHs. Skippy is a good sized boy, not huge, but not little either. He's about 15.3 and in pasture condition weighs in at about 1500 lbs, so roughly 700 Kg. He's a big, stout halter bred boy who just happens to be nice and athletic. Owners of cow bred mares, ropers, cutters, etc, who are looking for a little more height than their 14-14.1 hands and roughly 800 - 1000 lbs, 360 Kg to 450 Kg, frequently book to him.
I used to live cover but over time discovered that we had to have a strong human on the mare to help her stand her ground or Skippy would push her all over the place while breeding, making things pretty precarious. He also got kind of reluctant to breed them, they were just too small for comfort for him. We now collect him and AI with fresh semen, no extenders no cooling and have an excellent success rate.
The foals come out proportional but tend to get slightly larger than their dams, anywhere from 14.2 - 15 hh and very stocky. Here's a couple pics from this year. Obviously, we don't run into the "parts that don't quite fit" because it's the same breed but I, personally, would prefer the 'blood to bone' vs the opposite. I think that's why breeding Skippy to Boo worked out so well, both were big, stout animals and their foals tended to be bigger and stockier than either of them.
The 3rd pic is one of Skippy & Boo's foals at about 2 years old and 16.3 hands. A bit weedy, of course, because he'd not filled out yet.
Last edited by Dreamcatcher Arabians; 09-26-2020 at 01:54 PM.