Please can u share your OC settings?
You first.

What clocks are they running at on Windows and SMOS? Are the clocks the same or different? If they're different, then why are they different?
Hi
On windows I have these settings :core +50
mem +550
power 70%
Resulted into 22,5 mh/s
On SMOS I tried all of these settings :#1
core +100
mem +800
power 109
#2
core -50
mem 1050
power 75
#3
core 0
mem 0
power 140
#4
core -50
mem 800
power 85
#5
core +50
mem +550
power 85
and SOOOOO much more, I couldnt get higher than 19,3MH/s