All the worms can be super productive, but you have to factor in the waters you'll be fishing, size of fish, and your strengths (unless you are wanting to learn a new technique).
I like them all, but will share this: probably the coolest thing about a ribbon tail is that it has a ton of natural action, but once it hits the bottom it shrinks in size and continues to move. On the fall the 7" is 7", but at rest it is only 4.5". So you go from a ton of natural movement to an unassuming, easy meal.
Here is my PB on the 7" Ribbon tail (Diane and I were fishing the Mc Donalds Tourny earlier this year).


With that said, the Carrots are tough to beat...

Here's a toad Josh caught on a bigger Carrot:

There are a ton of pics of quality fish in the gallery caught on all the worms you are looking at. Pick what you have the most confidence in and expand from there.
Good luck!!!
Jason