I have them both stashed on one team in one of my leagues. If I had to choose, I think I would pick Escobar over Smoltz right now, simply because we don't know Smoltz' role when he returns. There is no doubt that Escobar will return in a starting role for the Angels, given all of the injuries/tragedies they've endured this season.
C M. Montero
OF J Upton, McCutcheon, Choo
Util Kendrys Morales
SP Gallardo, Bumgarner, Latos, Zimmermann, Luebke, Jaime Garcia, Hughes, Burnett
RP League, Marshall, Betancourt