c2, do you really think that the circuitry in the 8r would not be as sensitive near the 11 meter band provided you had the same antenna as any other CB radio?
Yes.
The VX-8R sensitivity spec is around 3.0 µV for 10dB S/N (0.5-30MHz, AM) whereas most CB radios are around 0.5 µV for 10dB S/N, AM.
Probably because the VX-8R has such a wide front end to cover the entire HF band with relatively poor filtering/IF gains and a cheaper detection circuit. Probably most of it is integrated into one IC. CBs just need to cover ~500 kHz.