Why Samsung Galaxy S9 and S9 Plus Does have Two Chipsets for Different Regions?

Samsung Launched Galaxy S9 and S9 Plus last week and as you have noted there are two chipsets which are installed in Galaxy S9 and S9 Plus for different regions.

Samsung built the Galaxy S9 and S9 Plus with Exynos 9810 Octa Chipset for EMEA countries and Qualcomm MSM8998 Snapdragon 845 chipset for USA and China. The processor which is embed to the phone had Octa Core processor which runs 4 logical cores at 2.8 GHz Mongoose M3 and another 4 Logical Cores running at 1.7GHz Cortex A55 for EMEA and the phone designed to USA and China had Octa Core processor with 4 logical cores running at 2.7 GHz Kryo 385 Gold and another 4 logical cores running at 1.7 Kryo 385 Silver.

EMEA Chipset Exynos 9810 Octa
Processor Octa Core (4x1.7 GHz Cortex A55 and 4x2.8GHz Mongoose M3)
USA & China Chipset Qualcomm MSM8998 Snapdragon 845
Processor Octa Core (4x1.7 GHz Kryo 385 Silver and 4x2.7GHz Kryo 385 Gold

USA and China markets are huge for Samsung almost more than half of sales coming from USA and China as if considered as a larger region. Qualcomm MSM8998 Snapdragon 845 chipset isn't something made by Samsung and the chipset which is in EMEA models of Galaxy S9 and S9 Plus Exynos 9810 Octa is made by Samsung. 

And by comparing the features which are there in the USA and China version of the phone with comes inherited to 845 chipset by snapdragon won't have the same features as Samsung Developed Chipset. The quick charging capability and the LTE supportive modem and several components can drive the Galaxy S9 and S9 Plus according to your expectation wont make you really happy with if you purchase your phone from EMEA region. Choose wisely and purchase the correct model that you want by having correct expectations.

Buying a Samsung Galaxy S9 and S9 Plus except from USA and China might not get 100% features and performance that you expected.