Personally,I would choose Dr Hakan if you would like to choose between those two Turkish Drs because Dr Hakan has better price rate and costumer service is excellent. Also, lately, they announce that they makes free PRP. Yes, Dr Koray's hairline work is great but Dr Hakan's hairline work is also great. One last thing, if you are going to use beard, then, Dr Hakan is the winner here.