Folks seem to gloss over the auto assigned IC sub feature of Dynacab in these type discussions
I was pretty sure, I used the same IC, but the auto impedance thing got the better of me. They are different, but only ever so slightly.
I must say, I think, it is weird behavior that it switches back and forth when I switch between legacy and DC channels in the cab block - I think, it makes sense that it switches the first time i choose a DynaCab. Anyway, the difference is this
Listening again this morning, I still prefer clip one (scene 3) over clip two (scene 4), although when I jump back and forth, the difference is smaller.
Between clips 3&4 the difference is much less apparent in the frequency spectrum, but I think there is a bit more depth and dimensionality in clip 3 vs. clip 4 - This makes me guess clip 3 is the Legacy IR. (I did have to put on mastering grade headphones (Ollo S5X) and go back and forth many times to hear this difference)
And now for the reveal (also to myself): It turns out 1&3 is LT TV Mix 7, and 2&4 is the DynaCab
To me, this means that in this attempt, I did not succeed in blending my dynamic and ribbon as well as Leon did, when he made his IR. It does not mean that DynaCab sounds worse in any way (also it is a different cab, and the ribbon might not even be the same model).
It also means, I still hear the added benefit of longer IRs.
If I did not have any IR packs already, DynaCab would definitely be my go-to over the factory cabs. It really is quite easy - even fun - to get in the ballpark. But I have bought many 3rd party IR packs, and when York Audio says "This one sounds good", I tend to trust him more than myself