Are the members playing in both instances of the band supposed to have the other one in the "see also..." part on each page or not?
I noticed that for the Swiss band Alastis, earlier Fourth Reich, one of the members has the vice-versa-link (Masmiseim), and the other two from the early line up don't, so I was wondering in which way this should be corrected.
On the one hand, it's kind of useless, because this type of bands are already linked in the additional notes, but on the other hand, a band name is often connected to a line-up change, so in many cases not all members are in both bands and it's nice to see right away which ones without comparing...

Sometimes I add it, sometimes I don't. As you mentioned yourself, for some bands that information can be relevant, for others, like a solo band, it isn't.