Vado Expert: 350 W Motor, 504 Wh Battery
Turbo S-CE: 500W Motor, 691 Wh Battery
500 € price difference. If they stop the Turbo-S-Version there's no model to compete with the competitors (Stromer).
I think the power-gap between those two will justify the Turbo-S in the product-line.
http://www.pedelecforum.de/forum/index.php?threads/turbo-s-ce-vado-2017.42331/