Plants vs. Zombies™ 2 vs. Plants vs. Zombies™ 2

Let's play "Spot The Difference"!

The review on the left comes from the North American version of Plants vs. Zombies™ 2 whereas the one on the right is from the Worldwide version of Plants vs. Zombies™ 2.

The above screenshot was taken shortly after the release of the North American version. The scores as of today have harmonised (4.2/5 vs 4.4/5) but there is still a disproportionate number of 1 star reviews on the American version.

Both have the same version number (1.8.265164), release date, "what's new" changelog, screenshots and are identical in filesize.

This leads me to two questions,

1. Are these really the same app?
2. If so, why the different scores?

I downloaded the APKs and decompiled them. Essentially, the only difference is that one says it's for North America. Given the size of the resources that both download are identical, it's hard to believe that there's any significant difference other than, perhaps, language packs.

It is the same game, where has the score disparity come from? Is it merely that the North American version has fewer downloads and - for some reason - early versions got poor reviews? Is it that Americans just don't like Plants vs. Zombies™ 2?

Finally - why bother having two separate versions of the app? In some cases, it could make sense (if you have to have different legal agreements) but surely most of that could be handled in the app itself.

Curiouser and curiouser.