Richard wrote, "The files are dated, use the most recent one."
That's one way of thinking about it, but probably not the best.? Newer does not mean better.? You might get the one made by someone who just got out of high school and first used SPICE two weeks ago.??You could also base your decision on who made the model, or what company published it (may or may not be the same).? Preferably, you should try the models and compare them with datasheets, or with measurements of real parts.
Andy