Are there any major differences from the original to the MK II vice the ACT05 that accompanies the MK II? I am debating getting the MKII but am afraid I will be unable to purchase the ACT01 that seems to only come stock with the original HS2000MX
the act05 is for sale standalone but not act01. so if you'd like to have the act01 anyway, the only way (except 2nd hand) is to buy the original hs2000mx. the original chinese article salwani888 cited (which also cited by acoustune on their own official weibo - it's almost a consensus that acoustune is a hong kong owned company with office in japan. e-earphone in japan lists their product as from hong kong, not japan) claimed they're identical except colorway and the capsule/eartips bundled with (act01 for the original and act05 for the mk2). this make sense as the body merely holds the capsule and providing the PE socket for cable entry. i saw some hong kong users claimed the mk2 seems less prone to scratch the beautiful and shiny capsule body so suspecting there're very fine revision to the body though.Same thoughts and debating buying SHO or not....but having heard both versions, I would be very happy with the OG and the extra cash. Whilst there were subtle differences, it was neither here nor there for me. Both were good, just slightly different. I was reading last night somewhere that ACT01 will be discontinued (or only available with Mk1. I also read that ACT06/07 are also almost ready so more options as add ons. The additional options make me lean towards Mk1 despite that ACT05 will only be available with Mk2.
This site has some nice info on SHO
https://min.news/en/digital/61f0dad6a00afabde43fbdf82205d972.html
If you search Acoustune on the site they have a few more articles too.
the sound of the original act01 is superb! there's more sparkling on the top end than the act05 ( i got act01 and 03-05). all four are very enjoyable but act01 sounds the best and the tuning seems a better match with the blue colorway to me subjectively (much more tasteful in terms of aesthetic design ). act05 gets more impactful bass which i like. yet it losses the magical sparkling in the treble to win my heart. the original is also cheaper so it may be a better buy (much cheaper if in 2nd hand market).
just my 2cents and hope this helps.