To add my 2 cents, while I don't think I'd be able to distinguish between 48 and 96$ white Burgundy wine, I would probably make the difference between 48 and 96$ red Bordeaux bottles.
It's just because I prefer Bordeaux over Burgundy and red wines over white ones.
It would probably be the same for discerning 48 vs 96$ pu'er... one will feel the differences between two nicely and affordable aged sheng while not being able to compare and discern differences between two young (and same price level than the aged pu) sheng from LBZ for example.
I think it depends on your tastes, drinking habits and frequency of sipping.
I don't know if I was really clear...
Time for afterlunch tea, bye folks.