Neither

sid, but now testin ...

I always say get the distro where the developers and users are mostly using the same user interface as the one you want. Yes, you can get KDE for Debian and even CentOS, but they are Gnome distros: the Debian developers had a vote only a couple of years ago on their default GUI and they voted to stick with Gnome.

OpenSUSE has always been a KDE distro, so it's one obvious choice. If you want an enterprise-class distro (as suggested by your choice of CentOS and Debian Stable), then try the KDE version of Salix -- Slackware with added user-friendliness. Salix normally uses Xfce, but the KDE is sound because that's the Slackware default. Actually, in my experience Salix is one of the few distros where all GUIs always seem equally reliable, from Mate to Ratpoison.

After using too many to count I wind up with Debian and KDE more than most. With not a complaint in the world, hello.

Goto http://distrowatch.com/search.php and search for KDE Plasma on "Desktop interface".

My first impressions is it's way younger than any of us! Still uses a lot of 4.xxx stuff? [Pause whilst I look around some more...] Aside from some more mainstream looks it seems the same, so far; systems settings, Dolphin &c... boasts a lot of bug fixes but had to go to sid to make it happen(or, Kubuntu? )

Definitely some improvements, touch-pad settings are off the chain!

I have always like KED for it's ability to trust me! (Once messed with wobbly window settings, uyuyuy! )

I would also say neither. Both Debian and CentOS are stable distributions so don't have KDE5 and are not likely to implement it any time soon. Yes, you can install it but doing things like that always leads to trouble. So pick a distribution which does have KDE5 and learn to use it.

We will see... 273; is that a riddle for The Village, should I rewatch it?

I don't think The Village has an OS of choice though I didn't ask them last time I was there (a couple of months ago) so I can't be sure.

Wait,,, are you serious, like when I went to Mackinac Island, (without giant sphere attacking me? )

Yes, I was there a few months ago -- the internet connection's pretty good when you're not competing with the other residents.

Sweet, it's on my list.