The Jeep Liberty and the Dodge Nitro are siblings under the skin, with the distinction that the Liberty is not ugly like the Nitro.
The Liberty is heavier than the Patriot and comes with a 3.7 versus 2.4 liter engine. And a six speed versus a five speed manual. And a simpler, mechanical, four wheel drive instead of the more technologically advanced (and involved) Patriot system. And the Liberty weighs more, costs more, and doesn't get as good fuel mileage as the Patriot.
I discarded the Nitro on appearance, and went with the Patriot for the better fuel mileage over the Liberty, even though I would have preferred the 3.7 liter engine and 6MT. Ninety + percent of the time I will be the only person in the vehicle on relatively flat land driving. Once or twice a year I may have someone in the back seat. If I were regularly carrying a family of four to the beach or the mountains, I probably would have gone with the Liberty with the 3.7 and 6MT, and tried to drive it for fuel mileage when I was in it alone.
FWIW, IMO, and YMMV.
