Default [Q]Storage

this may seem like a uesless question but it's bugged me ever since I got my LGOG.

Does the stock LG UI (4.1.2) really eat up 5-7GB of space!?

The OG comes with 32GB of storage (although I know that it's not exactly 32GB since there's a lot of conversion stuff going on) and there's only 25GB of available storage space? I know a friend who has a 16GB Nexus 4 running stock 4.4.2 KitKat and the stock KitKat only eats up around 3-4GB of storage. Is LG's UI really that much of a storage hog?

Another thing, does the 4.4.2 update consume the same amount of space? or does it consume more? And what ROM eats the LEAST amount of storage?


Sidenote: I hope somebody can make a bare-bones 4.4.2 ROM that will eat up the least amount of space