After Huawei's Kirin 980, the world's first commercial use chipset based on 7nm technology.
Which is based on two Super large cores (Cortex A76), other two large cores (Cortex A76) and four small cores (Cortex A55) in 2+2+4 cluster design.
Ronal Quandt has published on twitter that Qualcomm is doing what Huawei does with Kirin 980.
Where as Snapdragon SM8150 (SDM855)is based on 4 "Silver", 2 "Gold" and 2 "Gold+" Cores.

According to Ronald Quandt, the Snapdragon 8150 (SD855) will be unveiled at the annual press conference in Hawaii in December this year.