Conversation so far:
What was Joy Division's style of sound?
Joy Division's style quickly evolved from their punk roots. Their sound during their early inception as Warsaw was described as generic and undistinguished punk-inflected hard-rock.
Did Joy Division's style change over time?
Critic Simon Reynolds observed how Joy Division's originality only really became apparent as the songs got slower.

Question: Did their music sound differently from getting slower?
Self-contained rewrite: Did Joy Division's music sound differently from getting slower?