no its not - Finasteride & dutasteride do not interact with androgen receptors
Finasteride is an antagonist (blocker) of the enzyme 5AR (typeII) which is present in the prostate, skin & scalp - however Type I 5AR is more prominent in the scalp - so 5AR type I blockers would be more effective (dutasteride blocks both types of 5AR & is therefore more effective than finasteride in reduicing test related hairloss - I'm not aware of any readily available selective 5AR type I blockers)
Finasteride & dutasteride do not interact with androgen receptors
5AR blockers won't help with winny related hairloss as winny is a DHT 'based' compound - I've heard many say that finasteride won't help with tren related hairloss.