Since the topics in the special issue are more narrowly defined, you can avoid the pitfall of "not being within the scope of the journal" that leads to desk rejections. Sometimes associate editors disagree on what is within the scope and what isn't; and this problem will likely not happen with a special issue. Because all articles in the special issue are somewhat related, people doing literature review in that subject area will see them all, potentially leading to more citations. However, this may not be the case nowadays, because everything is accessed online. In the old days, I used to go to the library and physically find the volume, the issue, and the paper, and photocopy it. In the process, I would discover other related articles in the same issue. I haven't had to photocopy an article in so many years now.