I don't know much about the other Q LNBs but these pics are of the EL021. The scalar is skewed relative to the feed probes such that the scalar matches the dish for UK use (my guess), the LO is 10.41GHz, IF 290-2340MHz, V & H outputs are continuously available as shown on the C120 version. V & H circuit layouts and feed probes are different and result in variations between the performance of V & H although the response is remarkably flat. The switch mode supply puts lots of low frequency muck on the outputs.
I got mine from Amazon itself (not 3rd party) as refubs. 2 were duff on delivery because the top cover shorts the power tracks (probably a common fault, but fine for my purposes)