Neither one of those will fly anything like your Nexstar. If you are set on a low wing, you might want to try a four-star first. With it's big semi-symetrical wing, at least you won't have to learn to fly all over again.

Of the two your mentioned, the Tiger II is lighter and more forgiving. Both are much faster than your Nexstar. One of the new things you're going to have to learn is throttle management.

Jim