There are several differences.
The fist is in purpose : Kremsegg collection is intended as a commercial add-on of some historical late 18th - 19th century grand pianos.
KIViR is intended as a non-commercial "restauration" of historical instrument, with "historical" being more loosely defined than in Kremsegg collection : some instruments are way older (early 18th century, or modern reproduction of even older instruments), while others (the grand pianos) are even more recent (late 19th century and even 20th).
KIViR instruments are virtually "donated" to PTQ by their owners, while Kremsegg collection is issued from a partnership between an institution and PTQ.
This is regarding their status. But, as the OP said, besides their commercial status, the two ideas seems quite similar. What is the "compelling reason" of having BOTH KIViR and Kremsegg ?
Why, quite obviously, because each modeled piano is different from one another !
Even if, with Kremsegg, we have an Erard, a Pleyel and a Bechstein as we do in KIViR, they're far from being the same instrument.
In some cases, as in Pleyel's and Erard's case, the time span between the Kremsegg versions (respectively 1835 for Pleyel and 1849 for Erard) and the KIViR versions (1926 and 1922) is so conspicuous that one can hardly compare them, even though being from the same manufacturer. They are as different as a Fazioli and a Steinway could be.
For example, I do personally love the 1922 Erard sound, even if it is marred by all the primitiveness of a PTQ 2.0 modeling (I can only dream about how it will sound with the new update. I guess it'll become my main piano !), while the 1849 one, though having a purer sound, is less appealing to my ears.
Saying that KIViR instruments (or, at least, KIViR grand pianos) have no "compelling reason" to exist on PTQ - and to be updated - since we already have the Kremsegg pianos would be like saying that - if a Mr. X would want to "donate" the model of an old Steinway American D from the 1930, or of a Bluethner from the 1950 - PTQ should refuse to model it because there already is the D4 and the Grand Bluethner !
Last edited by Xain (15-06-2014 15:35)