I'd look at it in terms of what are you trying to get out of the two names?
- I want two names so I can have one be the sort of content I can show my friends/family/co-workers without worrying that they might find the more edgier or controversial stuff (ie the BL).
- I want two names simply because I want one to be the gruff, pervy, BL stuff, and I'm afraid readers who like that sort of thing or don't like it, won't come across my other genres and candypuff.
- I want to utilize just one name so that people who find my current projects interesting, might look through my works portfolio and find something else of mine that they will enjoy.
Three very different ideas, with #1 being likely a reason a lot of people source. I would point out that given the chance, and something I mentioned in the other thread, if I had the choice to make my dA writing name what my current name is (nostalgicelle into nostalgicroxas), I would have - it would have organized all of my writing under one name, in one portfolio, making it easier for people to find.
I've met and talked to people who do one of the three reasons I've listed above and for various reasons in their personal lives, but it usually boils down to one of those three. That's also a thing people source for their artist names being different - pervy content being under a different name so co-workers can't find it or such.
This isn't unheard of persay in publishing as a whole since lots of mangaka hired in Japan, for example, operate their doujin spin-offs (which are canonical to their story, because it's done by them) underneath a pseudonym / alias. And this is usually done, according to articles, for two purposes: 1 to seperate it from their professional work, and 2 to seperate it from their professional contracts.
As writing a doujin for their work (say the mangaka for Gravitation writing doujin's that are super perverted) would potentially conflict with sales through the public's impressions of the story if it's considered to be fully canon. Gravitation itself is rather tame, albeit 4th wall meta breaking on crack, but it doesn't contain any explicit sex scenes. The doujins however, done by what fans have deduced to be the official mangaka, however are very very NSFW - including suggestions of rape (expanding that rape scene from the main story), suggestions of orgies, voyuerism and exhibitionism, and other fetishes. As a whole, these aren't bad and pretty regular for doujins. However, if the mangaka put their name on the doujin as the same name that was on Gravitation, especially at the height of popularity, the story would have likely suffered and not run as long as it did, and likely wouldn't have been picked up for a 13-episode+1ova stint. And this was during the time when Sukisho (a graphic BL visual novel game) was also picked up for the same sort of runtime and was heavily censored.
Another comparison would be something famous and current. Let's say Avengers since they're comics and were picked up for movies recently-ish. If the creators of Avengers comics, let's say it was Lee to keep this simple, also had comics of various characters chopping off people's heads and gettin' it on, then the public's perception of the stories would be that it's all about that violence and sex and it wouldn't be applicable for kids. Kind of like when Joker shoots and tortures a certain Robin, and it's a miracle that's even animated. Lee would have to release that kind of content, assuming he wants to publicize it at all, under a different name. But, in the US, we don't have buddy-buddy understandings and agreements with copyright and doujins/fanworks that Japan has, so that kind of thing - since it would be considered "damaging to the reputation of the original" would be flagged and taken down ASAP with lots of damage control around it.
I somehow got off topic there... but the point remains. I hope. You can both benefit and hurt yourself and your work from utilizing the same name across everything. Which is the higher outcome more likely to happen - the hurt from being combined with all of your work together, or the benefit that your fans don't have to speculate if this is canon, done by you, or official in some other regard. I personally don't mind linking people to my pwp p.o.s.'s on Ao3 to read, but all of those works have been tagged appropriately with NC17+, explicit sexual content, and pwp, and so forth - so someone clicking the work without reading those tags (which the NC17 one is red) is blind as a fruitcake. And it's not my fault
Would I post that work here on tapas? No. #1 they're mostly fanstuff, #2 they're mostly stuff that hasn't or wouldn't happen in the main story, or #3 are AU- well and #4, are pwp prompt exercises.