I had (and have) Maschine Mikro which I upgraded to 2.0. There were a few items that were helpful...such as the new Mixer section.
I was in a period of transition with the Mikro, it is a useful tool and all, but I wanted the additional control components (knobs) that the full fledged Maschine offers. So I upgraded as a present to myself.
It seems to me that how effective either units are will depend somewhat on what you are trying to accomplish but since you are interested in Maschine I will assume that it has something attractive about it that interests you (which version may be a degree based decision). Based on that I can say that I like Maschine a lot. It provides some incredibly useful tools that are absent from Sonar and integrates quite well. It can be used as a controller, and a good one in my estimation, and you have the ability of audio sampling/mangling. As a bonus you have the ability to do some nice sequencing of things ala Live or Sonar's Matrix.
In short: +1
Regards