How better is 2001 E38 over 2000 E38?

I have read here that the 2001 E38 is the best 7 series ever built. (I understand everyone is entitled to his own opinion.)

Since I own a 2000 E38, I am really curious to know what is better with 2001 compared to 2000.

2001 E38s are significantly more reliable?

How better is 2001 E38 over 2000 E38?