Driving downhill in B

I tried the same slope using the B gear instead of D.


Here is the original graph, while driving in D:

Now the same road again, in B:

The battery started at a different level then before but, driving in B, gained a 13% charge, a minimal difference against the 14% gained while driving in D.

Here are the speed graphs.
D:

B:

Driving in B will force you to press the gas pedal to gain some speed where the slope is not steep enough.
Look at 19:06:30, where the slope begins: the car builds up speed slower than when driving in D.

Some more graphs: