Having worked both for at least 10 years, I think I am uniquely qualified.
I am going to just make some observations and leave it you whether it is an adavantage or a disadvantage
Retail is more physically grueling i.e. longer shifts, more time spent on your feet, "holding it", deferring water/food.
Hospital involves things that TRULY need doing immediately. Actual life and death stuff
Hospital has much more interaction with other health-care professionals.
Retail has much more patient interaction
Hospital has much more politics and cliques. This is largely a function of the size of a hospital department vs. a retail pharmacy. There is also more "us vs. them" mentality in hospitals. Outpatient vs. inpatient. Clinical vs. non-clinical etc.
Hospitals have much more opportunity for education.
Retail pharmacy defines how the public views the profession, because that is who the public sees.
my wife is married to a pharmacist