I am not sure as simple as that and I don't go overboard because something is priced at 2 lacs
For me specwise they are miles apart, Skyla uses outdated DAC chipset, whereas other ones are on 32 bit ESS Sabre DAC(not even 24 bits)
Sweet sound probably is because of other components like capacitors and regulators and SOVTEK.
As I said without audition its difficult to buy a component.