I haven’t used the page builder plugin before, so I installed it and tried it out.
The answer really depends on what you are asking. If you’re asking if both plugins can be active together and both work independently, then the answer appears to be yes. the Siteorigin plugin only seems to modify the post/page content area, and not take over the entire site.
If you are asking whether you can use the page builder functionality to create a term description, then the answer appears to be no. However, I believe that such functionality would be possible, and I’m willing to find a solution if people are looking for one.
