I attached a zip with 4 screenshots of changing setups on the T_Quinn_01_CCRCCPlastic_MSK texture.
I tried :
Unchanged (Linear)
SRGB
SRGB + source encoding = Linear
In all 3 cases I saw zero difference in the 3d view.
I also set the texture to black just to see what the effect is on the 3d view if this texture is wiped out completely, and you can see the effect of that.