I see significant number of opinions here on headfi stating that silicone CIEMs are much more comfortable than acrylic CIEMs as well as that silicone CIEMs isolate better. Well, my experience is opposite as to the comfort. Although both types of CIEMs work for me, but if I had to choose I would choose acryl (it does not stick to the inner ear as silicone does, it is easier to remove and insert). As for the isolation I would say they are on pair (different frequencies are attenuated by each of them).
Fully agree as to the Peter's work and customer service. Cheers Peter:beerchug:
Both can be comfortable.
Both can be uncomfortable.
Even though one might imagine that silicone would automatically be more comfortable because it is soft and acrylic is hard, it's more about accuracy of fit than it is about the material used.
But I do feel that silicone attenuates external noise a little better than acrylic.
...but I've never tried a silicone-filled (like SA-43) or acrylic-filled (like fitear CIEMs) acrylic shell, so either of those might be as good at attenuation as full silicone.
yes, i wasn't speaking for all, thats for sure, only my proper appreciation. Maybe it's a earwax thing too. I did have this issue with acrylic, i heard and felt every time the Ciems moved a bit (yeeees i wash my ears!).
The hard shell was more difficult to get in, whilst with the silicone, it gets easier with the time. But yet again, everyone has his preferences!