Thanks
but, yeah, that wasn't quite what I was going for. I was looking more for the "tightness of the weave" of plot and character in the three DC books. My impression was - to exaggerate a little - that they were closer to being a single novel in three parts vs. the first Xeelee quartet which, as you say, had a couple of basic standalones and then just the two that were more tightly woven to each other. But, for all I know, they just share the common universe and are three mostly-distinct stories.
I don't know if you were asking me or just anyone who might reply. I don't know, personally. I gather they're basically Clarke outlines that Baxter wrote and not real collaborations, but I could easily be wrong. As far as content and quality, I also don't know. But hopefully you were asking generally and someone can give you a better reply.