Well, I have tried the three of them.... Bad news is I am totally analphabet regarding describing scents... beyond citrusy, fresh and the like...
I have tried the three colognes and they go from light (Azur) to greasy, so to speak (Cypress < Wood, this one being the greasiest, so to speak). These two seem to be similar, but not the same... some hints of spring wood (pine) can be smelled in Cypress, a warmer, silky wood in Wood. Due to that greasiness, they have a decent staying power, not so the Azur.
Azur seems right for warmer days, Cypress for spring and Wood for winter. The descriptions Proraso offers do not help really, at least to me.. I can't find the citrus in Azur, for instance, nor the mint. But the three of them are natural, and that is important.
Anyhow, I still don't know if I'd buy them again... I am just getting used to them... but although I am a 'citrus guy' it means a lot that I haven't discarded them so far...