I never tried smelling them before, but I did just now. The Auza has no smell but the Cordigera has a very faint smell like roses.
The Auza grows in small rocks the biggest is 12mm down to about 5mm.
The Cordigera is in pure Spagnum I believe.
I have not yet repotted either.
Both orchids I bought through the local orchid society that I belong to. The Auza is from a fellow member and I bought as backbulbs with new growth. The Cordigera is from a collection donated to our society to sell. I am pleased with both. Together the price was 12USD.