The difference is about 260% give or take depending on the manufacturer.
It is a big deal. Digital cameras that size have used sensors about the size of your little finger nail until fairly recently.
The x100 uses an unusual sensor with a special pixel layout that means it doesn't need an anti-aliasing filter but the benefits of a sensor twice the size should outweigh the benefits of even that.
The difference is about 260% give or take depending on the manufacturer.
It is a big deal. Digital cameras that size have used sensors about the size of your little finger nail until fairly recently.
The x100 uses an unusual sensor with a special pixel layout that means it doesn't need an anti-aliasing filter but the benefits of a sensor twice the size should outweigh the benefits of even that.