The Nagano recording is of the first version, and there are some significant differences. The most audible and immediately apparent difference is the series of huge tam-tam smashes near the start of Part III. But there's certainly more than just that. Some folks argue that "Waldmaerchen" shouldn't be included with the revised version. I understand their point, but I also think it's a tad pedantic.
I'm certainly guilty of not discussing "DKL" very much, and will fully admit that it's not my favorite Mahler. But certainly all the elements of mature Mahler are in place, except for maybe a Berlioz-like, lack of contrapuntal writing. For a Mahler work that has a lot of vocals, I prefer the 8th symphony. But that's just me. The Chailly recording of "DKL" is also very good (good vocalists).
The final version of DKL (1899/early 1900), in two movements, is one of the products of Mahler's masterful skills of his maturity we know very well. The original version is undoubtedly the creation of the bold imagination of a youth. Consider the orchestration: among the vocal soloists, he requires soprano, alto, tenore, baritono, child soprano, child alto (these last for the "speaking bone"-Chailly reinstates the child voice, this way hybridizing even more his version), moreover, he requires some intervents by singular member of the choir; among the orchestra on stage, he wants 6 (!) harps and 2 kontrabasstuba; among the 19 instruments of the
Fernorchester, he calls for 4 fluegelhoerner in B (the posthorn we will find again in his Third).
The voices are not masterfully treated as in his later works, but the originality of DKL's writing for voices was never equalled, I mean specially in the passages concerning the "speaking bone".
In this original version, the
fernorchester is used also in the second part and the passage is sensational: over a pedal F in the bass the C major of the off stage orchestra clashes with the C flat major of the orchestra on stage. It's not surprising that DKL was not awarded a prize by Brahms and his fellow jurors of the Beethoven prize, in 1880!
The ones that reject the hybrid 3 movements version are not so pedantic as we can think. In 1893, in Hamburg, Mahler started revising the score, producing what we can name the "first version of the second version". While revising the first part, he decided to drop it. So, what is actually played in recordings such as the one by Tilson Thomas (which I consider my reference-recording) as Waldmaerchen is an hybrid that presents some parts of the original version mixed with not fully completed revisions.
For the ones interested in confronting the first version of Waldmaerchen with the half-revised one, the first has been published by Universal, the latter is available by Kalmus.
While the final version is masterful product of Mahler's maturity, I still consider the original version of this "first child of sorrow" very suggestive and fascinating and I regret no major orchestra have yet recorded it instead of the thousandth version of the First or the ten-thousandth of the Fourth.
Nagano's is cute, but it seems to have been recorded in an aquarium. Curiously, Jurowsky's (DVD) suffers something similar. The other version I know is the Geoffrey Simon's (North West Mahler Festival Orchestra) and Robert Olson's (Colorado MahlerFest Orchestra). I knew that van Zweden recorded the Hamburg version fo the First, but I never heard of a recording of the DKL's original version.
Regards,
Luca