Materna, Maftei Vass what is your opinion?

Considering they all belong to the Austro Hungarian school I'd like to start a conversation or a healthy comparison between these makers when it comes to

Construction techniques, similiarities differences
Uniqueness/ Nuances
Materials used, quality to price ratio, lasts, heritage et. al.

I know there are a few who happen to own all three brands so it will be interesting to know their opinions.
anyone with the knowledge even if theoretical please feel free to comment...