I haven't used RedHat since like 1998.... I wouldn't even be able to fathom a guess at its performance. I'm quite fond of our init system. Systemd was just awful and I'm honestly surprised it's still around. Solaris' init system is far superior, not that I'm supremely familiar with it, as it's been a long time since I've run Solaris in a "production" environment; and that was actually the last edition of SunOS, before they were purchased and right when OpenSolaris debuted. Everyonce in a while I like to pop solaris on a vm, but my nostalgia for it has dwindles, especially since zfs came to freebsd.