CCS1 is worse than CCS2 in a couple of ways. The latching mechanism is external which is bulkier and more fragile, and it doesn't support 3-phase AC charging.

CCS1 is worse than CCS2 in a couple of ways. The latching mechanism is external which is bulkier and more fragile, and it doesn't support 3-phase AC charging. NACS does everything CCS1 does in a more compact package with an internal vehicle locking mechanism similar to what CCS2 uses. It also doesn't support 3-phase AC charging but this isn't very common in light commercial or residential service in the US. NACS / J3400 will likely stay a North American standard though, or maybe migrate to a few other markets like S. Korea which have also used CCS1. That lack of 3-phase support makes it a non-starter in Europe and CCS2 works perfectly fine there.