I discovered that I did actually have my copy of that issue packed in a box ^__^
(sadly, the awesome-looking cover, of which there is a picture of in my OP, was torn away long ago)
from that same magazine:
So it was Ghouls 'N Ghosts for Genesis that won The Best Game Of The Year
they also awarded, as I thought, best game for each system.
Legendary Axe won Best Game Of The Year for TurboGrafx,
but not best game overall which was indeed given to GnG.
It's slightly confusing because you see best game was also given to Legendary Axe.
the difference is, it's with (TurboGrafx).
Ninja Gaiden won best game for Nintendo
WonderBoy 3 won best game for Sega Master System.