Why use a AD831 if the noise figure is 10dB?

It has gain, high IP3 and 10db my mixer standard is not that bad.
A low gain RFamp with low noise figure will override mixer noise.
Of course the RFamp must have a good IP3 as well.

Allison
Ok, I like to try the AD831.
When is dual supply better than single ended?
There must be a socket to fit the package but is it all right to solder
tiny leads to it for prototyping?

JJ