Planning to buy a second hand pc

Hey guys. Im planning to buy a second hand pc with the following specs:

Processor: i7-6700k GPU: EVGA GTX 1070 SC 8GB RAM: G.Skill 16 GB DDR4-3000

My question: would it be sufficient to play Valorant while using discord and stream on twitch without any lag or fps drop?

Im new to pc btw, so i need advice! :D

Edit: or should i buy this instead: Processor: i7-7700k GPU: Nvidia GeForce GTX 1060 6GB