Help to choose a graphics card.

Good afternoon there is a question between
MSI GTX 1070 Armor OC
and
MSI Gaming GTX 1070 8g ( stress without any letters just gaming)
The issue price of $ 40. Reviews on normal gaming I can only find either the X or the Z as far as I know OC is the top Armor in the series but it is cheaper not a top in Gaming.
What to take help?