I'd like to see if it is a bit more 'stiff' than the regular Xtra. I have carried 200lbs of mortar mix on the the regular Xtra which was fine on the flat but going up a steep hill was too much for my legs and balance (couldn't stand up because of flex). If I were hauling something as important as people, especially children, I would feel better with the extra strength version but I am a safe risk taker when possible.