NJM4580DD "maximum limits for equivalent input noise voltage"

[Aentons]

I'm ordering parts for a Fiery Red Horse and Mouser is out of the NJM4580DD so I started looking at the datasheets and noticed this in the doc:

"The D-Rank type products(NJM4580DD/LD/MD/ED) have specified maximum limits for equivalent input noise voltage."

The only difference I see is the test condition and typical vs max rating as seen in the screen shot. I assume that this means that the DD is less noisy. I'm curious what this actually means and how important it is for a high gain circuits like a muff?


Also, in the datasheet for the RC4580IP I noticed this:
"Place 0.1-μF bypass capacitors close to the power-supply pins to reduce errors coupling in from noisy or high
impedance power supplies"

Is this related?

The FRH doesn't seem to have the noise reducing caps.