Slightly more stable with a dually????? First time I have seen that.
My buddy tows the same trailer as me, he has a 2500 Duramax. He rode with me to the dunes one time, he said he couldn't believe how much more solid my truck felt than his. Semi's passing us, couldn't even tell etc.
He is now getting ready to trade his truck in on a dually.
Also, totally agree with Steve O Reno. I'll let others go down before me.
I put my truck in tow/haul, I can go down a 6% grade and not touch the brakes. Going around corners, rock solid.