The Ram 3500 is a truck built around one of the best diesel engines ever made, wrapped in a body that can't quite match it. The Cummins 6.7L will run to half a million miles with religious maintenance, but electrical gremlins and corrosion show up embarrassingly early, one owner found corroded connectors at 2,500 miles. Spec the Aisin transmission and budget for DEF system upkeep, and this truck will haul 36,000 pounds until the sun burns out. Buy it if you need maximum capability and can wrench or afford a good independent diesel shop; walk if you expect Toyota-grade fit-and-finish or can't stomach chasing electrical faults.
The R1T is the electric truck that drives like a sports car and rides like a luxury SUV, genuinely class-leading dynamics wrapped in a genuinely useful gear tunnel. The catch is you're buying into a startup still finding its footing: Gen 1 trucks suffer systematic 12V battery failures (some owners on their fifth replacement), service centers are scarce and slow, and Gen 2's rear door release is so poorly designed it requires panel removal in an emergency. If you love the truck enough to tolerate growing pains and can live near decent service, it's a thrilling machine; if you need Toyota-grade reliability or can't afford downtime, walk.