I don't know. It's a very divisive OS. Personally, I miss some of the Windows 8 improvements when I use Windows 7 at work, and would thus miss than in 7 vs 10 as well. But, I also haven't switched to 10 from 8 due to some of the controversial aspects of 10 (updates, privacy, telemetry) that are not in 7 either, or can be better configured in 7.
Relevant to this site though: Windows 10 does not support disc-based installs of Civ3, due to not supporting the DRM those discs use. Windows 7 and 8.1 patches disable that support as well, but in 7/8.1, you can skip those patches (which is what I've done). There's no way to not have them in 10.
Why does everyone hate on WIndows 8 so much? I love it. In fact, I'm looking to upgrade my gaming laptop and I found one at my local Best Buy that has what I want AND still comes with Windows 8.1.
I like Windows 8 too, and am running 8.1. The Start Screen was the biggest learning curve since 95, and I couldn't figure out how to shut down without the command line in 8.0 (8.1 fixed that), but now that I've become used to it, I prefer it. Nice big shortcuts for my most-used programs on the Start Screen, as many as I please and right where I want them to be, is much more convenient than the small Start menu of 7, and better than the small Start foldout of 10 as well. I also really like that there aren't going to be auto-installs of incremental Windows versions (Fall Creators update, etc.) or drivers that break the software I'm running, like there may well be with 10.
What'd you find that still has 8.1? My laptops are pretty ancient, and I've also been debating updating my desktop. Haven't yet though, in no small part because AMD's Ryzen does not officially support Windows 8.1