Well comparing the vertical details from the X0 project and another X0/X9 LD capture, in these screenshots the GOUT appear to have the same vertical resolution as the LDs.
GOUT
X0 project
GOUT
other X0 or X9 capture
But I agree there are some other shots/scenes/areas in the GOUT where the vertical resolution seems to be cut in half, but I would suspect it was caused by a crude AA filter and to some degree incomplete (lazy) IVTC work.