Differences between Mahler and Bruckner.
It's a wide-spread judgement, that all mahlerists are also brucknerists. Both composers belong to late romantism (close to expressionism), so the styles are similar. But there is a difference between them: Mahler's music is more expressive and daring, with much more small soul half-tones. What about Bruckner: he is more religious, not so expressive in his emotions, his musical language is less different than Mahler's ( for example, in his scherzos ( that I also like) the main thema often appears as it was at the beginning (1st, 3rd symphonies...), but Mahler repeats the same very seldom). I think no one composer builts music on such effective contrasts of dynamic and temps like Gustav!
What else different you can find between them?
What else different you can find between them?