Qualcomm Snapdragon 855 SOC will be found on most flagship android devices launched in 2019 and I give you an overview about the same the 5G support that it provides how much faster it is compared to SD 845.
More tech specs of Snapdragon 855 chipset https://www.qualcomm.com/media/documents/files/snapdragon-855-mobile-platform-product-brief.pdf