I have a pair of Tanchjim ECHO TWS IEMs. They have the same Bluetooth spec, identical codec support, and the same sized dynamic driver. They sound incredible to me and they only cost $99.
Why would I want to spend $249 on these? [Drop Rewards aren't a selling point for me, as my previous rewards expired because there was nothing compelling enough to use them]
liteon1just because it has the same specs doesn't make it the same, while I haven't seen graphs I assume it's a different tuning and depending on implementation/design could just be better overall, that said I doubt the performance per dollar is as good