Careful with blanket generalities like these!
I have been drinking treasure cn and chinaco, and i have to say that Old CN blanco trumps old Chinaco blanco. This old CN is soooo different from the newer "gimmicky" very vegetal newer CN profile. It is sweet and perfect. I need more!
"Old Chinaco" has quite a wide range of taste and quality. My experience with paper label bottles has been great, but teardrop bottles have been all over the map. Nevver had one that really struck me.
Agree with you that old CNC has better complexity and is more enjoyable.