My initial impression of this was good, and I think it's a fine performance. But I remembered having been drawn to other Bruckner 6ths in my collection, and for the sake of comparison, I followed Zweden's recording with Chailly's Concertgebouw reading. I thought I would be bored hearing the same symphony twice, but the opposite happened: I was drawn in by Chailly's clear lines, gracious shaping of phrases, and smart handling of tempo. And the sweet-toned, characterful playing of the oboist, among others, revealed the more secure control of the Concertgebouw Orchestra compared with Zweden's Netherlands symphony.
In the first movement, Chailly reveals a bit more of the spaciousness and mystery we're used to hearing in Bruckner, contrasting these elements effectively with its surprisingly powerful rhythms. In the second, Zweden's slower speeds prevent him from achieving the same level of graceful melodicism that is brought out by Chailly's more flowing tempo. Chailly draws the contrasts in this music more clearly throughout, it seems to me.
Zweden's recorded sound seems quite close up to me, and in fact the warm and present sound is one of the main attractions here. As Sante Fe Listener astutely observed, some of the "small notes"--the eighths and sixteenths--get lost in the tuttis; I assumed this was a problem with the orchestra, though it's possible the recording may contribute in some way. But again, Chailly's recording lets you hear everything.
In short, at first acquaintance, this seems less successful than some other Bruckner 6ths I've heard, and less successful than Zweden's 3rd. Other Bruckner 6ths that would make my five-star list, displaying attributes similar to Chailly's, would be Sawallisch, on Orfeo, and Skrowaczewski; I also have an Eschenbach recording (I'm not sure which of his it is) that I recall was quite good, but I haven't heard it lately.