Diesel more sluggish than gas?

Back some years ago I had an older Dodge pickup with a 160 hp Cummins diesel and a Chevy with Vortex V8. The Chevy would take off like a scalded cat empty where the old Dodge Cummins was sluggish from a dead stop empty. Put a trailer behind them and there was no comparison where the Chevy really struggled where the Cummins was night and day ahead especially when there were some grades. There is a reason OTR trucks have 6 cylinder diesels. If you want a drag racers the gasser will be ahead. But I suspect most motorhomes are not purchased for purpose of drag racing.