This post is not about the vocal quality of Elbis or Hèritier but as I am seen it seems like Werra is starting to develop with Elvis the same relationship he had with Hériter a Father and Son relationship not only in the music field he gave him a song  Block Cadenas on Ingeta and another one Désolé in 7 Jours so I think he is heading to that direction even though he doesn't show him a lot in public I think maybe it's because Werra and his real parents wants him to stay to school

I’m really liking how he’s keeping him low profile, like he does with his own children. From the interviews I’ve seen Elvis is also articulate.

He will be with Werra long term, but we won’t see him playing for drunk fans at la Zamba early Friday mornings for a few years

You are right.  Werra is now taking care of Elvis's education and upkeep. However he is also growing fond of Caferoum whom fans at Lazamba love so much for his vocal strength, consistency, loyalty and low profile.