I have heard at least one complete symphony from each set. The earlier one I would rank as nonessential, since you can get that luxurious BPO sound which is so on-the-money in Bruckner with Karajan, Wand, and Furtwangler (the trifecta of Bruckner conductors for me). The Dresden one certainly is "in-your-face" in terms of sound and performance- the brass is unparalleled, but I'm not a big fan of the interpretations even though Jochum is usually one of my favorite conductors. I find he doesn't make as much sense of the architecture as the three interpreters I mention above- I don't want to hear a bunch of brass players blowing their lungs out every 3 minutes. I want subtlety, shape, and narrative. And it doesn't help that Jochum tends to conduct Bruckner very quickly so as not to linger on the golden moments. Good Bruckner conductors should know when to push forward and when hold back the reins; I don't sense that in Jochum. So even though both the Dresden and BPO sounds are amazing for this music, I would not recommend either- at least for the casual listener. Gunter Wand should be the new Brucknerian's first stop. His performances are shorn of interpretation, disassembling the symphonies into their fundamental building blocks so you can understand the structure. Karajan adds some more personal touches and makes it flow a bit better- I truly believe his Bruckner 8 is the crowning recording of his career. Don't hear Furtwangler until you're very familiar with the music, but when you're ready- it can be like an out-of-body experience.