The 2.ZERO is what I have, and is the limited launch edition of the second generation Leaf, MY 2018. The 3.ZERO is the same thing for the third generation, MY2019.
The 2.ZERO is positioned just below the Tekna and has most of the goodies of the Tekna (including ProPilot) apart from leather seats and the BOSE sound system (which to my mind is a positive, since the BOSE takes up a chunk of the boot space).
It's only the 62Kwh that has had the height increased by 5mm - the ground clearance on the 62Kwh is 135mm where the 40Kwh is 155mm. In the USA you can order the 62Kwh with 16 inch wheels, that would make going over humps in the road interesting!
Enclosed the LEAF brochure from Sept 2019 for the specifications on the back page.