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It looks like the mason did a good job concerning the texture. But the color is way off. Unfortunatly its not easy to match new to old. The good news- Staining morter isnt hard to do if its not sealed. I suggest a few practice bricks and some best efforts at staining them to match, then do the rest. The bad news- it will probably never be pefect and if it is it will show after a few years of all that Texas weather torture.
The wash the brick mason is talking about is an acid wash. That should take care of the white stains. As far as the vertical brick looking a different color, the acid wash should take care of that too. However just like fabric and woodgrain anytime youbturn a material from horizontal to verticalbit will appear to be a different color because the grain pattern in the material is running differently and reflects light differently.
The acid wash should help with the motor color. As it ages it will naturally darken and blend.