From pics, it looks as if both make use of the front "frankenstein" bolt, but the Motech appears to have a spacer that might be about the same size as the front of the Ventura rack...???
The spacer is actually recessed to fill the space in the hole.. but like I said, I have not tried it, but looking at each item I'd be extremely surprised if they would work together. I can tell from the pictures on the Ventura website that it mounts the same way as the swmotech racks do.