FX4 and Lariat are on the same playing field as far as reliability and durability. They're just differently optioned out same truck afterall. So it either comes down to what looks better to you or a couple of their slight differences like the following:
Lariat has an option for several different ratio options (3.31, 3.55, 3.73, etc and LS or E-locker). FX4 you're locked into 3.73 Elocker with no other choices.
FX4 has an option for cloth seats or leather. Lariat automatically comes with leather.
Lariat has an option for bench seats or captain's chairs with flow-thru console. FX4 does not have bench seat option.
Lariat comes with Auto 4x4 in addition to 4 Hi, 4 Lo, and 2 Hi. FX4 does not have this.
Lariat and up trims have more sound deadening in the cab. FX4 does not.
Lariat has an option for two-tone color (in which you get colored bumpers as well). FX4 has an appearance package available with a big stripe down the side of the truck.
Lariat has option of tan or black leather. FX4 has option of black or reddish-black (with appearance package) leather.
Other than these features, it's purely just aesthetic differences.
Last edited by cegan1825; 06-01-2012 at 10:20 AM.