Nissan Leaf (gen-1) Old vs New Battery

[UPDATE 06-May-2022: Updating battery degradation chart]

Comparison of battery degradation (Nissan Leaf gen-1), before and after battery replacement:

Note that the top x-axis is for the new replaced battery, both plotted on the same date scale for easy comparison. My mileage usage is consistent every week, so using date scale for convenience:

The bump above, that was when I had recall from Nissan for battery software update, which I'm guessing is this one.

Now, for the difference in kWh/km reported by dash vs LeafSpy reading, comparing old vs new battery:

From my old battery below, 0.13kWh/km (dash) vs 0.18kWh/km (LeafSpyPro):

From new battery, which both has same figure at 0.12kWh/km:

However, do note new battery also suffers some difference (maybe depends on SoC?), as example below. I forgot to take photo from the dash on the day, but it was 0.13kWh/km on the dash (compared to 0.18kWh/km from LeafSpyPro):

Issue above causes the battery meter seems reporting discharge quicker, and then slows down later.