According to a report from Forbes, citing industry insiders in Asia, Qualcomm's latest Snapdragon 835 SoC "won't be available in large quantities until after the Galaxy S8 launches". This means that flagships coming before the Galaxy S8, like the LG G6 or the HTC U Ultra, will be sticking to Snapdragon 821 SoC.
In case you missed it, Snapdragon 835 SoC is based on the 10nm FinFET manufacturing process, has a quad-core Kryo 280 cluster paired up with quad-core Cortex-A53 cores, working at 2.45GHz and 1.9GHz and comes with Adreno 540 GPU.
The Snapdragon 821 SoC is based on the 14nm FinFET process but comes with two quad-core Kryo 200 CPU clusters and Adreno 530 GPU.
The Snapdragon 835 SoC also comes with a fancy new X16 Gigabit LTE modem, capable of 1000/150 Mbps, Bluetooth 5.0, 802.11ad WiFi and Quick Charge 4.0.
As wrote earlier, Qualcomm is promising a 27 percent faster SoC with 40 percent lower power consumption, so it is obvious that Samsung's Galaxy S8 flagship smartphone will have an upper hand.
Hopefully, more details will be available as soon as Mobile World Congress 2017 starts on February 26th, despite the fact that Samsung already confirmed that its smartphone won't be unveiled there.