There are three different drivers used in that listing. The one you got is the PK2 driver. The 16 ohm one is the SR2 driver. The 150 ohm is something else. All will sound different and to be honest, I think all will sound good. We have the ones with the SR2 drivers and love them.. but they do need a lot of burn in.
That is a good store... it is where my husband
@HungryPanda buys a lot of his supplies for making his own buds (which are excellent... but just a hobby for us... not for sale). He has made buds for us using the 32 ohm PK drivers from that store and they are excellent. He has also used the 150ohm drivers and those buds turned out well also.
I think you will be happy,.... but I foresee others in your future as well
Not a knock off or fake. DIY means that he made them himself.. or had someone do it. It is his creation... so not meant to be a fake of anything. He uses good drivers and tunes them to sound good to him... and hopefully to his customers.