Dutasteride vs. Finasteride, Which Is Better?

I am a 20 year old Indian male with Norwood 2- Norwood 3 hair loss. As per blood tests, my DHT levels are 1410 which is twice of normal range (250-990). My dermatologist usually prescribes Finasteride 1-mg, but has recommended taking Dutasteride 0.5-mg instead due to unusually high DHT. She said this is for cases like mine. My question is this: what is the difference between Finasteride 1-mg and Dutasteride 0.5-mg in terms of efficacy and potential side effects? Have you ever recommended Dutasteride ? Trials indicate it is far more potent than finasteride.

Finasteride is probably safer than Dutasteride which is known to cause sterility in young men. I never pay attention to the DHT levels as I don’t believe it makes any difference in my initial recommendations.