is unix distro same as linux distro? or there is crucial difference?

i'm confused as to what is classified as Unix distro vs Linux distro. Or is it same? aka ubuntu is both Linux and Unix distro and there is no difference? Unix is much older than Linux , was created in 60-70s; Linux is based on Unix and showed up in 90s. is ubuntu and Debian both Unix and Linux distros? or they stem from different things?