Also, polish is a surfacing agent.
Wax only protects the paint.
Carnauba wax is difficult to remove when dried. That should tell you something about it's long-term durability. Good results never come without hard work. That adage applies to car waxes as well as to anything else in life.
Easy on-easy off paste waxes are made for folks who are allergic to hard work.
You can find hard carnauba waxes in cans. Usually made by Blue Coral.