Clymene, but Elphicke was an MP up till the last election, just 8 months ago. He was suspended from his party in 2017 when the sex offence allegations were made against him, but the suspension was lifted a year later so that he could vote in the no-confidence-in-the-government motion then. So I think it's not surprising that this added extra interest in him with regard to media coverage of his trial.
Joyce, on the other hand, stopped being an MP in 2015, and for the last 3 years of his time in the Commons he sat as an independent because he was first suspended by and then resigned from his party. I remember reading about the assault that got him suspended. So Joyce's political career was a bit further back in time than Elphicke's and he had already been disowned by his former party long before his recent prosecution.
As I said before, I was shocked that Joyce only got a suspended sentence. I really hope any lack of media coverage - although a PP has said she saw plenty of coverage, and I agree (but maybe I noticed it because I remembered Joyce's record of violence) - wasn't because his crime was regarded as 'no big deal'. I don't see his case as having been 'buried' for nefarious reasons of 'I won't call out my pal's partner' or 'I won't call out the partner of someone whose stepdad is a big media cheese'. I see it more as 'I don't think this will interest my readers much' (including Burchill's readers in the Sunday Telegraph). But of course I accept I could be totally wrong here.