There is no similarity between DS audio and DaVa except that both are the most detailed I have heard. Jonathan Tinn owns north and he or Mike could let us know what he thinks about both
DS audio is not a field coil conical cactus stylus cartridge that can be put through an external phono, not does it have a tube power supply though is expected to get a tube encoder, I think. The sound and the resulting emotions are quite different between the two