Microsoft Lumia 950 vs Lumia 950 XL vs Lumia 930: What's the difference?

Microsoft has finally announced the heavily rumoured Windows 10 flagships - the Lumia 950 and the Lumia 950 XL, succeeding the Lumia 930. The 950 and the 950 XL are very similar when it comes to design and specs, differing in just a few areas such as...