Nice to have helped. Enjoy them!
I've owned the xb90ex, sold it. Still own the WD2. The WD2 kicks the xb90ex's ass is all areas of bass reproduction. To me the xb90 sounded plastic, polite and weak. The bass was very inconsistent. Also, the xb90 didn't do anything else expect "try" to do bass. The WD2 has a very enjoyable sound. I can compare it to the old Sennheiser IE8's when they are burned in properly. The WD2 carries a lot of bass, and also has a nice sparkle. For anything with EDM type music, the WD2 is a win. It will do other genres nicely as well. It is amazing because the WD2 is so light and small, yet it carries a punch.