There are two distinctly different BlackBerry Z10 devices. The STL100-1 features the Texas Instruments OMAP 4470 (SoC) dual-core 1.5 GHz processor and graphics chip (GPU) PowerVR SGX 544.
While the STL100-2 features the Qualcomm Snapdragon S4 Plus (SoC) dual-core 1.5GHz and Adreno 225 GPU. If you watch the video above you can see the STL100-1 with the OMAP 4470 (device in white) is significantly slower than the STL100-2.
The batteries, SIM card slot, and MicroSD card slots are all positioned differently with each device. The US/Canada have gotten the STL100-2 with the Snapdragon, while other regions receive the STL100-1 with the OMAP 4470.
Check out part two of the comparison between the two below: