Finasteride and Dutasteride both block 5 alpha reductase receptors. Dutast alot more than fina. Dutast does it to such a degree, it could grow your hair back with the proper procedures. But again, you need DHT, it's the most powerful form of testosterone in the body, dihydrotestosterone, why would you want that? I, with horrible skin problems, looked into it to see if it would help, and it's totally not worth it from the things I have read. DHT is responsible for so many things, including muscle hardness. Anyways, that's just my opinion on it.
If you care about your hair, keep away from tren mast winnie, or harsh dht compounds. Keep testosterone at sane dosages, and try to rely more on deca, it's more of an anabolic. Will be much slower to be a baldy this way, but ull become one one day either way whether or not you like it