I don't have Solista or C10, but I do have an S-stock "Raimundo 150 Especial" that in fact is a Cordoba Solista. Raimundo 150s are not line-produced guitars. You can verify my claim by googling the model name. Mine features gorgeous looking French polish and a truss rod, and is good enough but not excellent for public performances, as further discussed hereafter.
As for the guitar, it is nicer than my production line Raimundo (145 flamenca blanca) in terms of appearance and feel, with French polish (145f has polyurethane finish and kind of little cheesier), but both 145 and 150 sound good (but maybe not excellent for discerning ears...) for concerts, if you are not competing for GFA.
It is not that loud (mine is a cedar one) and sounds more of historic cedar guitars than newer doble tapa guitars. But that also means it doesn't have the nasal sound that I do not particularly appreciate. It sounds clear and deep/warm with sparkling high-end and loud yet tight low-end frequency ranges.
The only concern upon my purchase decision was, Raimundo 150 Especial (that is Solista) has a truss rod that is un-traditional at all. But so far I have not seen any difference from the guitars without it.
There are brands that seem to be from one single factory, such as:
* Ramirez (some models), Cordoba Espana, Louis Romero, Salamanca (= Raimundo)
* Almansa (= Alhambra)
* BM, Admira, Aria, Alvaro, etc. (= Enrique Keller)
And so on and so forth (but again please verify my claim by yourself).
This fact may come into play if you are a student, or if you have a student in need of a good guitar, because they have different price tags and you might have a luck getting the same spec guitars for less.
Lastly but not the least, I do find Japanese/Korean/Chinese guitars sound good, except that, they still bite dusts somewhat when I need the ff range volume and up oftentimes. Some Spanish brands have outsourced to Korea and PRC, but it's more like when we travel through Europe, We buy key rings saying "Rome" or "Paris" but they may be all from PRC... It's increasingly difficult to find something NOT from PRC.
I hope this helps you, and cheers.