>>394152887
It doesn't matter, it's one multiplier.
Option A becomes 1.7*0.7=1.19 in the end for example.
If the particular dev is retarded, the game could ignore the steam multiplier, so if you want to work everywhere you can just set the option in the oculus app to the highest that your pc can run without dropping frames and leave steam at 1.0x. 

Also, the way oculus present multipliers is stupid, so start thinking in rendering resolutions instead, it is consistent regardless of refresh rate.