Sounds are subjective... since you have both boards, no one can give you a better answer about which version of a particular sound is "better" than your own ears. But we can still speak about other generalities, like I think everyone would agree that the YC has better pianos/EPs.

But a few things worth pointing out when comparing these sounds:

... SK Pro sounds are highly editable, the YC sounds have very minimal ability to edit. Which also means that, when you say "It could have 50 (exaggerating) called different string type voices but they are comprised of the same waveforms in combination because you can build 4 part patches," the variations are not merely the same waveforms combined, because each of the 4 parts can have their own independently edited versions of those waveforms (with different filters, envelopes, etc.).

... the Synth Lead section which you call basic and limited should be seen in the context of the fact that the SK Pro has a whole separate Virtual Analog synth section (the mono synth with all the front panel controls), for lead synth and bass synth sounds. It does not use sampled waveforms at all so those sounds do not appear in your list. YC has no VA synth function, the sampled synth sounds are the only "analog style" lead synth sounds there are. So not only does the SK Pro have more, but unlike the YC, the SK Pro also lets you create your own.

... a real clavinet has 4 basic sounds (the AC, AD, BC, BD pickup positions) from which all other clav sounds are generated. Unlike the YC, the SK Pro has all four of them. (A real clavinet also has its own dedicated specific EQ controls and a mute bar, neither board specifically emulates those, but the SK Pro samples are very editable in their EQ and envelope parameters so even these variations could be more accurately emulated.)

So getting back to generalities, at least from my perspective, and to some extent just based on the technologies involved, I'd say Hammond has the edge on organ, clav, and analog-style synth; Yamaha has the advantage on piano, EP, FM sounds; and then each acoustic instrument emulation probably needs to be compared by itself. That's sonic differences... then there are other differences like action, programming depth, ease of use, MIDI functionalities, output routing, etc.

I have not yet experimented with building edited sounds but I have combined 4 into 1 for like a massive orchestra voice, bells etc. I'll have to try to edit some but that obviously takes time but can also be enjoyable. I have the Sk outs into the YC inputs because the YC73 keys are fantastic. Not organ keys but the most addictive keys I've ever played on besides my CP1. Might be better actually. Dare I say Yamaha could build a combo YC with upper & lower manuals with double everything. That would be nice.

Photo. Interesting how photos will never post on this forum even if you comply with the requirements.

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I tried the .jpg and .gif and .png in a small file and nothing works. In the year 2022 this is simply pathetic. IF the file name extension is automatically made in capital letters it will automatically reject it even though it complies with the file type. One time I got one to load can't remember what I did but this is really pathetic. Even when it claims to have uploaded there's nothing viewable in the photo square on my end, just the name of the file. Can anyone see it?

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@david: I've experienced a similar issue in another thread when trying to attach a .zip file.
The file is present but I get a 400 error when trying to access/download it.
The same thing happen with the images you've tried to post.

I'm starting to suspect it's the umask on the server which are not giving the uploaded file the correct permissions (world readable) and reject any attempt by the web server to read them.

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It's really too bad how nice it would be to post photos but as long as I've been here it's never worked and the fact Yamaha can't figure out why it doesn't work and pay someone to fix it. Why have the option when it doesn't function? Either fix it or remove the option.

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