Now I had first the original Apple In-Ear Headphones ordered. This has identical conduit as the original ("on ear") iPhone / iPod earphones, and also the identical operating unit. However, quite a small driver. Sonically, I was a little disappointed, the sound of in-ear was only marginally better than the on-ear. The highs were a little clearer, but the volume was disappointing.
For comparison, the Sennheiser headsets significantly larger driver. Included are also 2 types of rubber pads in three different sizes, as well as a bag and a cable clip. The operating unit has identical features as the Apple version, the keys in my opinion have a slightly better tactile feedback. There is also an asymmetrical cable routing.
Sonically provide the Sennheiser in-ear Apple clearly in the shadows - I would say a difference like night and day. Crystal clear highs, finely emphasized mids, and a rich volume. Also seems to me the efficiency to be slightly better.
A strong buy recommendation, especially as significantly cheaper than the Apple.