Free weights are far superior in the long run mixed in of course with a smattering of machines.
This is beginners stuff son! 
Broscience.
There is no difference between machines vs free weights for overall health and fitness, as I initially stated.
Is there any evidence that lifting free weights causes a reduction in heart attacks, strokes, alzheimers, diabetes, hypertensions, vs. machines?
As I said, for overall health and fitness, machines work perfectly fine and free weights are not needed to lead a healthy lifestyle and reduce the risk of a variety of diseases.