I recently found this excellent video taking a deep-dive into the Nissan Leaf reduction gear housing
Summary, seems like there are two versions of the gearing
7.94:1 for 2011-2013 ZE0 (White interior)
8.30:1 for 2013-2017 AZE0 (Black interior)
This would explain why the first gen seems a bit peppier than the second generation.
Do we know if these can be swapped between versions?
Both ways would be interesting, the ZE0 version is better for quick acceleration, and the AZE0 is better for energy economy, so it would depend on your usecase what you desire. Anyone tried this?
EDIT: Further research on this has proved the opposite. The ratios should be turned the other way, 1:7.94 accelerates slightly slower than the 1:8.30 version!