How do I know the difference between NTSC and PAL on the cover of the game when buying it?

[The Sparrow]

Title basically, how do I know the difference between NTSC and PAL on the cover of the game? I know it says PAL on the PAL disc and it says nothing on the NTSC disc. But I'd like to know the difference in the game case/cover

 

[Pauer]

I highlighted the biggest differences on the game covers:

Spoiler: NTSC Cover

Spoiler: PAL Cover

 

[The Sparrow]

Thank you! Damn these are really hard to miss, I almost would have bought the version of Smash I don't want