:bsmilie:
To TS, there is no right or wrong camera at all. The more important thing is that you learn how to produce the photos that you desire to achieve.
Different sensor sizes, different base iso values, different in-camera processing are just some of the things which you have to overcome.
Above all of that is the skill and knowledge of the photographer that determines the end result. That is to say, the final settings that you use, the vision, the composition, the post processing etc.
There are people who say that the A7R can never be a street photographer's camera due to the massive pixel density more suited for commercial and landscape photography, and the fact that the shutter slap is extremely loud. But there are many photographers out there doing just that: street photography with an A7R.
So once you transcend the gear that you use, expect that your photography skills will reach the next level