[help needed] Coil on plug question

[puff]

actually they have those numbers (signal is pin no1 on both units). but still, I can't understand the role of these two units. just power transistors?
hey ho!

Снимок экрана 2018-01-07 в 1.35.04.png (88.77 KiB) Viewed 2211 times

[puff]

hey! they have individual ignition timing on per-cylinder basis! cool!

Снимок экрана 2018-01-07 в 1.39.23.png (181.11 KiB) Viewed 2209 times