Is there a difference between the models?
The only difference is that the 2nd pair is silver in color.
What are you going to be using them for?
I have a pair of Sennheiser HD 380 Pros and they are the best headphones I have ever owned. I bought them to use for mixing and mastering my music and they are amazing. After listening to an album with them I had listened to hundreds of times, I heard sounds I had never heard before within the songs.