Which one do I believe?

Sorry man I don't have a legit answer for you. All I can say is 1: That's hilarious. 2: I'd believe the Lumia one
 
Storage checker does not show complete list of apps I have installed on my 920 (hardly 6-7 ) after 8.1 update.
 
Uninstalled from the 925

I need Storage check on the 521 to manage maps for now.
Unless Storage sense gets updated to manage maps and other features in the future.
 
They might be using different definitions for "other". If one takes a closer look, you can see that System on the left, for example, is 2.6GB vs 1.9 GB on the right. That accounts for 700 MB right there.
 

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