WM5102 and WM5102s announce higher DAC & headphone amp specs but the WM5110 has a much higher compute capability and also better ADC.
Think about: decoding and playing compressed audio streams while the system sleep; stuff like that.
You can take a look at apparently leaked product briefs linked.
(WolfsonMicro's website doesn't share it for now)
With pics of the whole thing, even bits of x-rays of some chips.