Most of the people commenting on here will post their opinions of which is better. Ultimately it's up to you.
FX4 has standard flow through console, PTM bumpers, black grille, black interior, choice of cloth or leather and probably some things I'm missing.
Lariat (since you mentioned it) has flow through console or 40/20/40 front seats, chrome grille, 2 tone option otherwise chrome bumpers, choices in interior color, standard leather, bigger choice of rear ends and probably some things I'm missing.
Both are the same bodystlye, same engine choices, same transmission, same company, etc. It's all personal opinion on which looks better or provides better for everyday driving.