The Hermes has a more detailed cockpit/panel.
The Comet also has more detail in the cockpit, some errors in the FDEs have been corrected (mainly for FSX) and there are some external improvements - more refined textures, a more accurate undercarriage, and the vertical tail has had some cosmetic surgery
![Wink ;)](./images/smilies/wink.gif)
I hope you like them. I will probably upload to classicbritishfiles.com tomorrow, if I have the time.
You should install the new Hercules sounds by Gary Jones for the Hermes, and there is an updated version of the Comet 1 sounds available at classicbritishfiles.com as well. I have not included these new sound packages with the models, as they would make the downloads too big. The Hermes defaults to the DC-3 sounds, the Comet includes the first version of the Aeromusica package.
Happy new year,
Jens