How does the Akadema and the Vinci compare on thumb protection?
The pad along the thumb is very similar. The thinner palm pad gives the Akadema the appearance of a thicker thumb pad when looking at the palm, but looking at the thumb edge, they're very close - definitely more than Mizuno. I'm noticing that the thickmess and shape of the thumb pad on the Akadema really helps to keep the ball in the mitt.
I don't know a college catcher who has switched to another mitt after using a Vinci. IMO, the lack of feel/feedback that EF's DD has experienced will likely become a non-issue when the pitching speeds consistently exceed 55, at which time the 'extra' padding becomes a close friend and valued protector. And if you get one through Casedawg or Chaz, the mitt is a real value compared to others' top end models!
I agree that my DD's issues may not exist with a 12" ball coming at a faster pace. For an 11" ball at 45-50mph, it disappears (for her) once the catch has been made. There's no doubt that Vincis are high-quality mitts at reasonable prices.