Sorry for the vague title, I am not sure which category this falls under.
Which of these is correct?
While it is harder to identify and measure than IQ or experience, and certainly more difficult to capture on resume, its power cannot be denied.
Or
While it is harder to identify and measure than IQ or experience and certainly more difficult to capture on resume, its power cannot be denied.
Should there be a comma before the second and?
Which of these is correct?
While it is harder to identify and measure than IQ or experience, and certainly more difficult to capture on resume, its power cannot be denied.
Or
While it is harder to identify and measure than IQ or experience and certainly more difficult to capture on resume, its power cannot be denied.
Should there be a comma before the second and?