Website links have two versions by Aldus Roger of the Lafayette Playboys Waltz. On the first one, it's an older band of his and the vocal is maybe Popeye Broussard or Roy Morgan. On the second one, it's a later version sung by Phillip Alleman.
The vocal melodies sound quite different than Eunice Waltz.
Many waltzes sound alike. Make sure the Eunice Waltz you are listening to bears the name, "Evangeline."
The other Eunice Waltzes from Acadia and St. Landry are frauds. There's been a boundary dispute amongst these parishes and their claim to the Eunice Waltz.