Don't stress.
HiFiMan v1: SMC connectors, backplate, wooden cups, plastic yokes, basically unavailable these days.
HiFiMan v2: 2.5mm connectors, no backplate, wooden cups, plastic yokes, slightly revoiced, about $300 in the US.
Adorama v2/v3: 3.5mm connectors, no backplate, plastic cups, metal yokes, major revoicing (according to many), price varies but around $300 on sale. Differences between these two very close models detailed in a post below.
Get the v2. That's the easiest to find, usually the cheapest, and it's the one that people are talking about when they talk about the 560. Meaning, reviews and user impressions will be more accurate. They are also said to sound better than the v3, from what I've read.