@ckreef Was in Michigan last weekend and was able to take a few pictures of the fire grate on the bigger Yukon fire pit.
The outer circumference/edge of the fire grate is 12" below the upper rim of the fire pit.
The center of the fire grate is 7 1/2" below the upper rim of the fire pit. The fire grate has a 4 1/2" bow from edge to center.
The directions for all the fire pits say to keep the fire wood below the rim of the pit for proper secondary burning (the cool feature of this fire pit).
With dome shape, the bigger pieces of wood stick above the rim and disrupt the secondary burn. It really limits the amount of wood that you can stack into the fire pit.........taking away a lot of the benefits of the larger unit. In my opinion..................for the price difference.................is not worth buying the larger Yukon fire pit.
Hope this helps!!