Recently I treated myself with an Icom IC-R8600 receiver. Of course I wanted to know how it performs in comparision to other radios I have. Here is the result.
tl,dr;
The IC-R8600 is generally less sensitive than the two radios I compared with. That is to be expected, since it is a wideband, all purpose receiver, the other radios are more or less specialized to their purpose.