3D scanner for both replicate and quality control 3D prints
Thus question is very close to being out of the scope of the questions encouraged on the 3D Printing SE site,  but you have worked closely with Trish and Oscar to make it into less of a "recommend" question and more of a "how might I choose" question 

What to look for in a 3D scanner?

You mentioned using the scanner for quality control.  Lets start with that.

The best way I know to do optical quality control is to image each layer after deposition rather than viewing the completed object.   Especially for printing engineered objects,  like rocket fuel pumps and jet turbine blades,  it is important to be able to see inside the object and detect voids, bad adhesion, and points of unexpected stress.  That is hard to do with the full object,  and easier to do layer by layer.

But this may not be the QA requirement  you are trying to meet.  Maybe the gross object appearance is what you are controlling for. 

If so,  you need to define what is good enough and what is a failure.  With those criteria,  you can see which scanners give you that discernment. 

I suspect that won't be far off the requirements for the "reverse engineering" you also intend. 

Another criteria is the software.   

It's the workflow simple,  or can it be made simple?  20 clicks through detailed menus which must be done correctly and in sequence is not easy to get right twice a week when you need out. 

Consider the color of the illumination

Be sure it will not interact badly with your objects.   A red laser does not scan well a red object. 

More is more, not necessarily better

Higher resolution is great if you have three I/O channels to support it,  the disk space to store it, the RAM to hold it,  and the processing power to absorbable it.