nmosx2f.spice,nmosm2f.mag,comp.out

I cannot see the layout without the base cell

sky130_fd_pr__nfet_01v8_YS6SFH.mag

.

sky130_fd_pr__nfet_01v8_YS6SFH.mag

Your

nmosx2f.spice

file has

W=2

and

nf=2

, which means two fingers of total width 2um, or 1um per finger. Your

nmosm2f.mag

file has two fingers of width W=2 each, so the total is W=4, which does not match the schematic.

@Thanks @Tim Edwards