I have seen the KO City Commander molds. They look similar in pictures to the real article but in person the quality differences are very noticeable. I'll name a few:

1. Armor parts don't fit well with the inner bot (arms slide out, shoulders don't stay in place)

2. The molding and paint finishes are rougher.

3. It is more fragile so the chances of breakage are higher.

The above appears to apply the same for all KO City Commander versions (Magnus, Shadow, Powered).

Note however that there are 'variations of intensity' when it comes to the flaws above. All the CC KOs have problems but how severe it may be can vary from toy to toy.