There are differences to be fair. The acts, of course, are the same.
However, Mcinnes was seen by the fourth official, sent off and post match (to his credit) admitted guilt and that he'd take his punishment.
Scott Brown was filmed on a camera phone appearing to gesture towards Rangers fans (we know he did but an adept lawyer would make a case against it). Celtic and Neil Lennon threw a hissy fit and proclaimed a media circus was trying to get Brown banned based on little evidence.
All things being equal you'd see a similar punishment given out but the circumstances are different.