Raft is set in another universe with a gravitational constant a billion times stronger than this universe's. The cast are all human, but the novel is implied to be part of the Xeelee series. Timelike Infinity is set in the Solar system and while the Xeelee are mention I don't recall them making an appearance in the book. Flux is set inside the mantle of a neutron star, and the Xeelee make an appearance off-stage towards the end.
In what way have they got it wrong?
Perhaps time to reconsider Baxter ... I read Timelike Infinity (no stong impression of any kind) and Anti-Ice (didn't like the "steampunk/alt-victorian" vibe much) quite a few years ago.
Did read H-Bomb Girl recently, when it was nominated for the A C Clarke award and enjoyed that a fair bit.
Where to start reading his SF now?
(I can probably live without the AltHist too - I only tend to find it fun when its a period i'm interested in the real history of before reading an alt version)
I actually like the sound of this Mammoth book of Anternate Histories collection that's coming out shortly, I might check it out. But, yeah back to Baxter. I definitely want to read some more by him...
On Baxter I immensely enjoyed The Time Ships (sequel to Well's Time Machine and I thought superior) .