I cant say that my ears be better than anybody, but i can say that the materials modify the sound, this can be more or less for you, but it is. I test with the changes inmediately comparing materials with two similar models.
Caoba wood is very easy to work, but expensive. Them the carpenter and me choose sapeli because it is cheaper an have a similar weith and texture. Iroko is very lighter, and good wood too.
I cheeked that the big change in sound is produced by the weight the "cebra" wood have different textures and velocity, i think this is not important, but it cant be the perfect choice, you see anytime an instrument made of that?. More material or weight produce stability but less bass, them 325 and gs1000 are the most detailed sound cups.
Certenly the big diference are in drivers, but them we can modulate the sound with materials and cables. When i designed my cups i calculete the weight for be similar than RS1 for this, and the carpenter made them "al hilo", the three grow direction, as the original cups.
Finaly i want to know if rs2 have the same drivers than 325 and 225, you know somebody who test it with a 225-325 wooden?. I never heard rs2 but i think that are´nt valorated so much for his
price.
The plastic stand is the same than lower models, and even the wood looks worst, cos have more nerve. Even being the same wood the carpenters have different qualitys pieces of wood. The high age of the three made best propieties.
Finally the aluminium is too heavy and bright in sound in my opinion, and it si very unconfortable in a brand committed per se. not to mention the charm to wear a piece of a real natural tree.
Greetings from Spain and enjoy your music.