As I said to James about the 20y/o TGY (James sent me these teas, thanks for the opportunity): "It's okay as fuck. It's the definiton of okay. On a one to ten scale, it gets an "okay". This is the strongest neutral feeling I've ever had about a tea". The NanYan got a "better, but not that good. Gets an okay, cool, above average, don't mess up the aging by roasting next time, mystery guy.".
In conclusion, both of these teas are very okay. Some more okay than the others.