I have never owned a 4S, but I have owned a 4 and a 5. Apparently, the 4 and 4S are damn near indistinguishable, so this comparison may be useful for you. I have listened to both with Bose OE2i, so a fair bit better than the standard bin lids that come with the 4. I would say the 5 is quite noticeably more detailed, and more transparent (according to the definition in the longwinded thread last week :rofl: ). The 4 was noticeably bassier than the 5, this took some getting used to. I think overall the SQ on the 5 is higher, its more balance, but for things like Hip Hop or D&B the 4 had more kick and was a bit more fun 🙂
The new Apple buds arnet bad, on a par with the Senheiser CX300 II I destroyed by washing machine (To be fair, it took 3 washes to finish them off !). Since they are hard and not squishy, I find them uncofortable for falling asleap with 🙁