Is this a fake LEGO torso?
I note the printing of the light gray doesn't line up on the sides compared to the dark red texture line. The light gray on the top is in the same position relative to the red printing, but on the questionable torso the light gray printing doesn't continue the dark red printing.
The dark red printing on the questionable torso seems to be in absolutely the correct position; the known torso seems offset a little to the left. Thus the observation that the light grey printing on the sides being out of place.
The light gray printing would be placed in a single pass, so I think your suspicion that this is a fake is not unreasonable, but given the imperfection of the original, I'm not willing to make a definitive call.