The first question you need to ask yourself is: "Do I want a model of a Santa Fe 2-8-2 or do I simply want any brass or brass/hybrid steam locomotive?"
Sunset 3rd Rail currently has no Santa Fe steam available, save for the Pennsy L1 lettered for Santa Fe (of which the Santa Fe had three that saw little service.)
The Lionel model is pretty accurate, save for some running gear details because they're using a pre-existing drive from a model 2-8-2 they've already produced. And of course, you get the Lionel Legacy bells and whistles.
A 3rd Rail model will be accurate over-all. The model comes with TMCC/ERR Cruise control/Railsounds package.
Bear in mind that both the Lionel Hybrid and 3rd Rail models are produced in quantities based on pre-orders.
Rusty