The Webb is definitely more of a wake board than a cable board. Its not very fast and at 20mph would feel very slow. I also thought it landed like a ton of bricks.
The Union is much better. Its got a little flatter rocker line and plenty of flex to make rails fun to press on. I love my Union, it has been great at the park so far. Its got some scuffing but I have been very impressed with how it holds up.