Bigger plug is a big one, like you mentioned. 3 phase isn't an issue in the US version IIRC, but it still has more pins than NACS to maintain backwards compatib

Bigger plug is a big one, like you mentioned. 3 phase isn't an issue in the US version IIRC, but it still has more pins than NACS to maintain backwards compatibility. Thicker + heavier cables too (not sure if that's required by CCS or just an implementation difference w/ NACS). Together that makes CCS much more unwieldy than a gas pump. The NACS latching mechanism is a lot better- latch failures are a big part of why so many J1772 chargers are broken and unusable.