Nee WW bonus consists of 3 factors:

1. Honor
2. Land
3. Science

Honor formula: (Enemy honor+own honor)*10%*kd size relative to #1 land (capped at 0.33).
Land formula: ((enemy land+own land)*10%)/kd size relative to #1 land.
3. Science gain formula: 5*wars won (including current).

Example:

#1 land is 100K
KD A is 40K land 60K honor
Enemy kd is 30K land 70K honor
Kd A wins the war and receives:

Land: (40+30)*10%*1/0.4 = 17,5K land
Honor: (70+60)*10%*0.4 = 5,2K honor

Reasons:

1. Buff land bonuses for smaller KDs so they can catch up.
2. And force them to fight good KDs.
3. Nerf honor bonuses for small Kds to force honor KDs to grow and fight good KDs if they want to win.