Slater
Headphoneus Supremus
AAC, no AptX. To be fair, I don't reckon headphones or earphones with that codec are automatically better than ones without. It certainly is more than a label than it is a qualification for sound quality.
One interesting thing about these codecs is that when the manufacturer implements it in their product, they can choose from many parameters that ultimately affect the quality of the end result (such as bitrate). So sure, product X may use aptX or AAC, but at a really low bandwidth.
It’s like me telling you a ring has a diamond in it. There’s a huge range of diamond qualities, from perfect/flawless all the way to industrial grade that looks like a piece of dirty rock salt.
So I’m with you, in that just because the codec is used it doesn’t guarantee awesomeness.
Some products are very transparent about the actual implementation specs, such as the ES100. And that’s why people say it sounds so good. But a lot of these products are a black box other than the chip and codec used.