There are at least 4 different versions of ATE:
1) Silver ATE
with vent holes and with
black/gold metal cable "reliefs".
Driver inside has red plastic housing.
This is my first version:
2) Translucent black ATE
with vent holes and with
silver/gold metal cable "reliefs".
Driver inside has red plastic housing.
This is my second version:
3) Translucent black ATE
without vent holes and with
black/gold metal cable "reliefs".
Driver inside should have blue plastic housing (not 100% sure).
4) Translucent black ATE-S with
black memory wires and with red plastic cable "reliefs".
1st and 2nd generation ATE should be using same drivers and difference in sound basically came only from different housing material.
3rd generation ATE should have blue housing drivers inside and don`t have vent holes on housing - this is where ATE got different feedback from several ppl as I remember.
4th generation ATE-S looks clearly different by cables and should have bassier sound according to many ppl. Information about driver housing colour is missing to me and vent holes seems also to be a mixed bag - some have them some don`t, at least I know so.
Hope this makes clearer which ATE to get. From my personal experience and others impressions 2nd generation ATE seems to be best. Idk if there still are any available though. Maybe ask seller before buying?