Long time Viscaria user. I've owned half a dozen Viscarias and two Bolls, and tried many others over the years. No two blades are identical, and there are slight differences on average between the models. But for me the only significant difference is the handle shape.
Stiga all wood blades are very different. If you try one, the first thing you might notice is that the blade vibrates a lot more than the Boll ALC. The extra vibration is energy that's being absorbed by the blade and your hand rather than going back to the ball, so the next thing you might notice is that your shots are a little less powerful. If you're like many people who start with a carbon composite blade and then try all wood, you won't like the all wood at first. It might feel almost hollow. And why use a blade that makes you work harder to hit the ball fast? Slowing things down, and getting more vibration feedback, might help develop your technique. Some coaches swear by all wood blades for developing players. Others don't think it makes much of a difference, or even prefer composite blades.