Samsung is launching in March 2019 at MWC 2019, 4 models of the Galaxy S10:
Galaxy S10 with 4GB DRAM, Galaxy S10 + (Plus) 6GB RAM, galaxy S10 X 8GB DRAM and Galaxy S10 X 5G with 12GB of DRAM.
Please note on the chart below thanks to /LEAKS the Huawei P30 Pro is also arriving with 12GB of DRAM and in March 2019 as well.
This information is not Official yet as well as the names of the 4 Galaxy S10 variants.
Before related post:
4 Samsung Galaxy S10 models coming in 2019. One will be 5G ready.