When comparing solydK vs Redcore Linux, the Slant community recommends Redcore Linux for most people. In the question“What are the best Linux distributions for KDE Plasma 5?” Redcore Linux is ranked 14th while solydK is ranked 40th. The most important reason people chose Redcore Linux is:
It is a full stage 4 build that is fully compatible with Gentoo.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Solid
As the name would suggest, SolydXK is rock solid Debian.
Pro Stage 4 build of Gentoo
It is a full stage 4 build that is fully compatible with Gentoo.
Pro Focuses Qt-Software
It focuses Qt-desktops and software but it also has GTK+ software available if you need them.
Pro Easy to use
Best Gentoo based distro.
Cons
Con Installer doesn't recognise partition table SOMETIMES
On a couple of occasions the installer has told me one of my disks is missing a partition table but it definitely has one and other distros haven't presented this warning.
Con Default theming not to everyone's tastes
The default icon theme in particular is IMHO pretty ugly. Easily changed but if you like to just plug & play without changing themes it may not suit you.