A difference being that the video game industry wasn’t founded by a shitty dude trying to rally the internet to abuse his ex-girlfriend. GamerGate was. Misogyny may be incidental to (and, to be clear, endemic in) the games industry, but misogynist harassment is literally the originating and animating motivation for the GamerGate ‘movement.’
The ‘ethics in journalism’ stuff was a post-hoc rationale, itself rooted in misogynistic lies stating that the original woman targeted by the mob had exchanged sexual favors in return for favorable reviews of a game she worked on.