Towing comparisons

My dad has an 06 Mega Cab Cummins. He used my 2019 Ram 2500 6.4 Hemi to tow when he was waiting on a new hitch to be delivered for his truck. He said it’s a night and day difference between his older truck and my newer truck. Obviously his Cummins has much more towing capabilities than my Hemi. But he said it’s how the truck drives and tows is so much nicer than his 06.