If vihaan is vansh why was he behaving like vihaan even when nobody around and why he would burn someone's body as vansh when there were none to witness it 🤔 ... so may be that body was placed there with vansh's clothes and wallet by angre, after kabir said the body was not found, so that police finds it and his death gets confirmed, while vansh might have already secretly managed to inform angre of his arrest and to track the vehicle so angre might have reached the spot and falling from cliff was as per their plan...
vihaan might be some con artist who kept track of these underworld dons, so seized this opportunity n burnt vansh's body there so that he can enter vr mansion as vansh and have his money.... the real vansh may be shown later 😎