Assembly pattern; Different versions/variants

Hello,

I'm currently doing some testing on assembly patterns. I have created an example. I want to change the number on each cube without having to create 4 separate parts (Currently when I edit the sketch on any instance, all the instances change with it). Is there a way to isolate certain features so I can change them on each instance, but everything else is still linked?

Any help is appreciated, maybe You even have a different approach that works.

Best Regards
Nils Schütz