Hi Roger
The most modern "conventional' receiver in my shack is a restored Heathkit SB-303. Using the same test setup the SB-303 measures 5-6 dB better on 10 meters than does the RXII.
It should be noted that the difference between the two would only be discernible to those who live in very quiet, low noise rural locations. For most people atmospheric noise on 10 meters will exceed -130 dBm and this would make the difference moot.
Warren Allgyer
9V1TD
Warren Allgyer