I found this video of the Dazzolin pickup. It is a comparison to the L R Baggs in bridge pickup.
I am not sure if both pickups are used with the same preamp, and I do not know which preamp is used.
Also I do not know if it is the same violin used - It looks like two different fiddles? In my opinion both pickups should have been mounted on the same violin and the comparison made in one go for the best evaluation.
I would of course like to test this pickup myself. This would make it is easier to compare with the others tested here on my blog.