This is the first I've heard of the comparability argument. At first glance it reminds me of the old, "separate but equal" catchphrase we used when dealing with

This is the first I've heard of the comparability argument. At first glance it reminds me of the old, "separate but equal" catchphrase we used when dealing with ethnic minorities in the US. The system led to treatment that was indeed separate, but equal... not so much.