Try them both on and go with the pair that feels better.
That said - Go with the Lightspeeds, they are superior in every way. I fly every day as a CFI and work in one the biggest pilot shops in the world. I have tried every popular model on the market including Bose and the Lightspeeds are the best. Nine out of 10 people who compare Lightspeeds and DC go with the Lightspeeds. The are quieter, more comfortable, and cost less. The only people who pick the DC's have big heads. I mean that literally. If you have a really big skull the Lightspeeds don't seem to fit that well.