The Nokia Lumia 925 and the Nokia Lumia 920 have very similar internal hardware which include a 4.5 inch Super Sensitive touch display with a 768 by 1280 pixel resolution, an 8.7 megapixel PureView camera with dual LED flash capable of 1080p video capture, and a 1.5 GHz dual-core processor with 1GB of RAM.
However the following video comparison will take a look at the design and external hardware on the device to see the differences between these two flagship handsets.
source - My Nokia Blog