I have two sets of Ambrosio rims from the 80's and I plan on building up wheels with one of them. One set is Montreal Durex and the other is Metamorphosis. I can't find a lot of specs that tell me which is lighter/better/stronger etc. They are both currently built up on hubs that I don't want so I can't really weigh them. Any insight into the comparative qualities of each would be much appreciated. If you had a choice, which would you go with?