I see valkey getting a lot of attention recently, as it is a newly founded alternative. What is the major differences over using TiKV which has been around for

I see valkey getting a lot of attention recently, as it is a newly founded alternative. What is the major differences over using TiKV which has been around for many years? https://www.cncf.io/projects/tikv/ https://www.cncf.io/projects/tikv/