Most Amiga games were (re)released several different times by several different publishers in several different countries. There really isn't a standard look for an individual game.
Civilization is a good example. My own copy has a label that differs from all of these and looks like it was done on someone's Inkjet, but it's legit through and through.
Here's Lotus III.
Once you start getting into 1994, 1995, or later, the packaging budget for Amiga games typically goes way down and you'll see more printed labels.