For EDM, the Cascade is a better fit, IMO - it has a fuller bass profile which lends tracks a healthy and robust push in the lower registers. It is also fairly warm, lush and thick. The highs are not particularly clear or airy, though. On the other hand, the LCD-2 Closed Back is decidedly leaner in tone, with a distinct improvement in resolution, clarity, and dynamics. Bass on the LCD-2 Closed Back is also typically planar, with faster transients and snappier beats. However, the Cascade produces bass in a more engaging manner, offering better texture whilst retaining fairly-good control over the technical-related components (e.g. layering and detail).
I have
compared the 2 headphones here.