It is an interesting chart, but not exactly perfect in it's approach.
It makes the blanket statement that single conversion radios will be
excluded because "Double Conversion is necessary to reduce images."
The mere presence of double conversion circuitry does not guaranty a
reduction in images in my experience. This can be seen in the DE1103
which has serious problems with images from strong signals at twice the
IF (900 khz) down. And the DE1103 was included as one of the final
five at least in part because of it's purported resistance to images.
I assume the DE1102 has similar image problems, but don't know for sure.