If I had to choose between a Nitro and a Liberty I'd definitely take the Nitro, largely because it's available with the 4.0 V6, the Liberty is still saddled with that stuck-in-the-90s 3.7 V6.
I say keep the Nitro, nix the Liberty, IMHO the Nitro is better looking.
Good points. Lose one of them. If the nitro can satisfy more people and garner more sales, keep it. Just don't have two products w/i such close proximity.
Again both points are valid.