+1!!
I currently own two Sadowsky's and played this one for a while at NAMM
I will say it.....
Valenti's are Valenti's and not Sadowsky's.
Sadowsky's are Sadowsky's...... period.
Both are great basses.
Pro's and Con's don't really go into my discussion, just different.
I don't think that the Sadowsky pre is an option for Valenti basses anymore, but I can tell you that the above J bass sounded very different from my Sadowsky's. It seemed to be a little hotter in the output, and growl a little more when played hard when compared to my NYC UV. Both basses are Alder/Rosewood. The above Valenti has NJ4SV's so this might attribute the sound. This is my only experience playing the Valenti, and it was a very positive one.
Obviously, Sadowsky's have the best build quality IMO in the business. Nino does AMAZING work and the basses I saw at NAMM are top notch with zero defects. Personally, I don't know how he can charge so little for the bass, except that he's doing this for the love of it, and not so much to become rich off this endeavor.
In Summary, play a Metro, if that is what you like and the color is cool, go for it because you tried it, and dug it. If you need options, Nino offers great build quality and almost any option you want at a ridiculously low price. (realtive to other builders with similar options) I think he offers a 7-day trial which is more than generous considering the amount of basses he produces. That shows utmost confidence in himself and his work. I don't know if they can chime in, but I'd imagine that neither party is happy about all of these comparisons. IMO, Nino is not copying Sadowsky, and is doing HIS thing the best he knows how to the the result is producing a great instrument. He is fortunate enough to have been around some of the best builders in the business.
If I hadn't bought a NYC recently, I'd consider heavily about buying the above bass. (cheaper than a Metro) IMO, it's a great value.