Is it the same planet?

Yes, yes it is. 

Scaling the Rim is set roughly 70 years After (initial) Landing. Going Ballistic is set in 751 A.L., Blood, Oil, & Love in 752 A.L, and A Perfect Day in 753 A.L. (Or is it 754? Must go back and check. Pretty sure it’s the next summer, not two years later.)

…I haven’t worked out quite when Shattered Under Midnight takes places, because it’s so far off-planet that it doesn’t really matter to Akrep. Will probably take more stories to put the puzzle pieces together. And more stories to fill in the historical gap. (The problem with the direct sequel to Scaling was that I didn’t have the technical chops to write the story I wanted, when I tried to tackle it. It’s in the projects folder, waiting patiently with other partial stories, including the sequel to Shattered.)

As for those of you who asked about the slur "Dogs", some insults hang around a lot longer than the original meaning or application. In fact, it was originally applied to the security team on the arkship by the scientists, lifting from an old insult for polizei. They ran with it, just like other group have owned their insults as monikers (This group happened to have free and easy access to genetic manipulation, onboard ship. So their descendants who didn't, had cold tolerance... and claws.) By the time Lizzes walks into the ballroom, it’s a Fed insult for Imperial security forces and police, which… is almost full circle. (Linguistic shifts and etymology are like ecological history: utterly fascinating when you dig into them!)

And "shards"? Well, we'll cover exactly what happened to the arkships, and why the survivors ended up at the bottom of a crater huddled around geothermal warmth, later. That's a different book.