Well I really didn't address the esthetics. I did say structurally they will all be the same. If Mitsubishi says the Mirage sold in Sri Lanka can tow 1,000 lb. then all Mirages are capable of pulling that weight, safely I may add. I'm too lazy to search but I recall something being posted about an actual weight the Mirage could pull.
Here's another take at it. If you don't think your Mirage is safe to pull 600 lbs. then explain to me why you feel it is safe to load the cabin with 600 lbs?