Logenn,
The 10 vs 12 would be a Mass question in terms of cartridge matching. Also some cartridges work better in 12inch arms than 9 inch. I haven't but I would bet a cartridge that is very low compliance will benefit on the 12 inch. The Kuzma is reported here to prefer very light weight & light VTF cartridges. Correct me if I am wrong.
The 10 vs 12 would be a Mass question in terms of cartridge matching. Also some cartridges work better in 12inch arms than 9 inch. I haven't but I would bet a cartridge that is very low compliance will benefit on the 12 inch. The Kuzma is reported here to prefer very light weight & light VTF cartridges. Correct me if I am wrong.