Simple: In reality, there has never been at this point "thick" Bass, never "beautiful" heights. Sennheiser and Co have all simply part sealed. If you listen to the song new, something else happens over. Here, the sound is unpleasant but nich, he is always exactly as it should be.
Whether any of the neutral sound like, of course, is another matter. If you like it bassy-booming like is probably better to give up 300 at a pair of Sennheiser CX, here high-end is available in a small format.
In my view, the UE 10 are very good in-ear headphones for an amazingly low price (I paid 186). Who is on neutral, balanced and just pleasant sound, here is the best advice, all other please again to Sennheiser.