To add a little more here - the worth liberty advanced is a great mitt. It can and does work for a lot of very good catchers. My daughter used one to the point Brettman re-laced and re-padded her worth mitt.
However, that's the mitt she used when she developed the thumb problems. For whatever reason, with a certain pitcher, she just couldn't (or didn't) get her glove low enough (inside low pitch) fast enough. It caught her thumb a few times and once that happens, it's hard to get back to normal.
She did the thumb guard, evoshield, etc.. with some success but missplaced it, didn't use it when her thumb was feeling better or got called into catch quickly and didn't put it on and....eventually...caught a ball wrong and the process starts all over.
I can say personally using both, the worth and vinci, there is no comparison. Both are great mitts. They each have their place. But the vinci, while only marginally heavier, is built like a tank. You barely feel the ball when you catch it. It works great for catchers with a bum thumb. It does take a loooong time to break in, but once you get there, it works very well.
But, it won't help your thumb when you over run a base, slide back in head first and catch your thumb on the cleat of the opposition. You then have the thumb issue all over again.