I think that mostly, the thing both have in common is that the public love a pitchfork and the media knows this.
The crux of PS’s downfall was his testimony in his brothers court case. He hadn’t divulged this to his circle and it’s pretty obvious that his failure to report his brother at the time of finding out what he was doing has been applied by them to situations they feel he has put their own families/reputations in danger. He was turned on by the media once his ‘protections’ were lost.
HE’s scenario is relatively tame by comparison. It isn’t proven that underage activity took place and is relying heavily on unsubstantiated claims to fuel outrage. The basic facts are sordid but not illegal and arguably nothing to do with HE. The addition of the young person using money they received to fuel a drug habit isn’t anything to do with HE unless he was supplying drugs .
In both cases reports of being an arsehole aren’t really relevant. Being an arsehole isn’t illegal and is mainly used by the media to cement ‘loyalty’ to a side.
All that said, I don’t think HE should return to the BBC. I think his MH is clearly too fragile to play the above game. Stand alone interviews would be enough for him to address his innocence regarding accusations of law breaking and other rumours.
Ultimately neither have broken the law so public opinion is largely meaningless and just that - an opinion. The people they have hurt (wives, children, parents, partners, etc) are the only people who have the right to such depth of feeling about their actions imho.