I made some comparison by specification, camera, battery, and price but unable to judge which one is better. Any user review on these 2?

simple, reno is slightly better for gaming, while vivo is just better for selfie,
especially compared to Renos' selfie came. Vivo is just better.
But quality wise, i'm not sure about vivo, last i watched reviews where its series(v23) doesn't even have a good mic(poor noise isolation). So, do check more on that. Vivo and Reno have lots outlets la, berlambak out there, just go directly and check la.