I rode in business class and coach on Amtrak trains. The upgrade is only worth paying for on certain trips.

I booked Amtrak's business class on the way to Boston and coach on the way back to NJ. The seats were similar, but the experiences didn't compare.
AOL

I compared Amtrak's coach seat and first-class roomette. Even for a short trip, the costlier option was worth it.

I traveled from Miami to Tampa aboard the Amtrak Floridian. The coach seat felt similar to plane travel, while the first-class room offered more accommodations. Overall, I found the private roomette ...
Crain's Cleveland Business

Luxury sleeper buses used by the Browns are reshaping first-class travel

After two road games this season, the Browns’ 6-foot-4, 275-pound All-Pro defensive end stretched out in a private sleeper suite aboard a Napaway coach — a luxury bus with lie-flat beds and ...