We've looked at the Ventana LE. Never seriously looked at the Mountain Aire (last name isn't Gates or Buffett
Check out the Ventana LE specs. I think the longer models have decent towing/GCWR specs but not the shorter ones. The MA can tow a house.
Then again, you're probably not interested in a sub 40 foot Ventana LE anyway if you're comparing it to a MA. Something to consider if you are.