The phrase "inferior version" refers to something that is of lower quality or not as good as another version.
Sentences with «inferior version»
What I see is a patchwork of alternatives, some of which are inferior versions of the previous system. (schoolsweek.co.uk)
But there's still far too many triple - A or big name titles getting inferior versions on PC. (techradar.com)
Looks like inferior versions of multiplats if you can stand the grinding noise coming from the cheap harddrive to match the cheap GPU & memory. (n4g.com)