1: What is difference between "much more" or "far more"?
2: Is the incorrect sentence, below I mentioned, really wrong?
3: If so, how should I use "much more" or "far more"?
Incorrect: Since her husband began playing violin, Molly has become much more expert in distinguishing a tuned instrument from an out of tune one, a Stradivarius from a student rental.
Correct: Since her husband began playing violin, Molly has become far more expert in distinguishing a tuned instrument from an out of tune one, a Stradivarius from a student rental.