Pardon my ignorance, but as far as I could hear and see by the video, he is using the manufacturers preset sounds named 'RockOrgan'.
Also he pointed out that it is differences regarding soundcards, processing and outputs.

Yes, in this case Genos was clearly different from Hammond and Ketron, but so is it if we listen to diffrenet artists recordings / concerts where 'RockOrgan' sounds being used.
If add extra soundpacks it does wonders, but if work with drawbar settings and more, would it be possible to mix it up to sound a bit closer than it does in this 'demo'?

To compare products is fun and very interesting, but the sounds played here is not all the same preset 'Hammond RockOrgan' samples, so why should it sound perfectly equal as the big H? 🤔