Just got one this week. The Tungsten Cortez is a reproduction of a late '50's Fender narrow panel tweed Deluxe. I have a few late 50's Deluxe amps that are original. I also have a RI '57 Fender Deluxe with a Weber (replacement) speaker. (I don't prefer the RI Jensen speakers at all.) I used all the amps for comparison.
The Tungsten Cortez is really an excellent Deluxe reproduction. I put NOS tubes in it and played it for about 8 hours this past week. The speaker still sounds a bit "new". So I connected a late 50's Jensen P 12 Q to the Cortez to see what it sounds like compared to the original Fender Deluxe with the same speaker and tubes. It makes the grade! The Cortez sounds like the old Fender, but with less fatigue. I have no doubt it sounds like the original Fenders did when they were brand new. Even after just 8 hours I can tell "just a slight breaking in" mellowness to the speaker. So in a year of playing it should be just about right!
Of course, I believe that "many of the components" of the amp need time to "settle in a bit" before the amp hit's it's sonic peak in life.
The build quality is a modest notch above the Fender RI '57 Deluxe. The Tungsten has better caps/components than the RI Fender and a "little better" attention to build quality too. (Though the RI Fender is not built bad at all, and it sounds very good). The Cortez is several hundred dollars less expensive though, and seems to provide just a bit more bang for the buck.
If you are considering a new Deluxe amp I would highly recommend the Tungsten Cortez. With maybe some NOS 6V6 and 12AX7 tubes for icing on the cake.