Went today and had two pork tacos and two carne des res tacos. They are much more generous with the meat than ECC but I missed the salsa of chopped radishes, cilantro, and I think jicama. At tres reyes they top the meat with chopped onion and a generous amount of cilantro but they were a little limp. You do, however, get a caddy of salsas and a jalapeno relish if you want to heat it up a bit. Sliced radishes as well.
All in all it was a little more satisfying than ECC simply for the quantity of meat- to me they are a toss up. I love them both. I will add that I almost always get chorizo at ECC- it rocks!