Rebecca Soler voiced Tecna in the 4kids season 3 dub of Winx Club. She used to be known as Jessica Paquet.
The name WOW itself means World of Winx.
The spinoff is an alternate continuity from the original show, the most notable element being the Winx trying to keep their fairy identities a secret from the people of Earth, while the original show has Earth already being aware of the existence of fairies from the start.
Haven Paschall (Bloom), Alyson Leigh Rosenfeld (Evans), and Billy Bob Thompson (Cliff) also worked together in the Pokémon anime (in the X Y era) as the voices of Serena, Bonnie, and some of the pokémon respectively.