The 5m 59 element-DJ9YW-yagi and the 1,8m Kathrein dish with a linear feed
have the same RX and TX signal on 23cm.
You see the 23cm EME car/p dish-vs-yagi test from DL3OCH.
Only an optimised and exactly adjusted circular feed allows a gain up to 3dB.
If the feed is not properly calculated or attached, my yagi is more effective in most cases.
This screenshot shows a sensibility RX test with JT65C (version 5.9.3) (DJ9YW RX and DF5OR TX).
The sked and the deep search decoder are inactive! As you see the fields "to radio" and "grid" are blank. In additon, the text file "call3.txt" was completely erased, that the DSD is not able to work even if active.
As the screenshot displays, even signals with about only -29dB can be decoded, and not at a minimum of -25dB, as often argued or published.
The sensitivity is not increased with is an active DSD, only the decoding time is faster.