GallardoThese feature an in-line microphone and remote, slightly thicker and more durable cables, a straight 3.5mm jack compared to the angled of the original, and an all-black color way that's exclusive to Massdrop. Not taking color into account the analog to this version on Amazon would be this, which sells for $60: https://www.amazon.com/Koss-Microphone-Remote-Headphones-Collapsible/dp/B0763T9Y4Q?ref_=bl_dp_s_web_2529745011
(The Porta Pro KTC is also a similar option for about $10 less at $50).
Of course the OG Porta Pros are just fine especially if you like the color and don't need a mic/remote, but for an extra $6 I love all the additional features of the Massdrop version (and the color!).
GallardoIt should be noted that the Prota Pro KTC is an Apple specific version of the Porta Pro. If you want to use them with non-Apple devices you may have problems since the KTC has a different TRRS wiring scheme.