Shedding vs thinning, which is worse? (from Reddit)

Yes, there is a difference in what you see. Both thinning and shedding of hair are manifestations of hair loss. Sometimes one will shed hair, sometimes one does not shed and just recedes in the hairline, sometimes, you see thinning from shedding. All of these are ways to pick up that you have a hair loss problem which should be evaluated by a good doctor.