There's also Franz Osinga's book Scince, strategy, and war, which covers John Boyd's work in detail.
Auftragstaktik describes a clear purpose / intent. Like: capture the bridge (but: we don’t care how you do it since we can’t foresee specific circumstances)
OODA describes a process of decision making.
So, Auftragstaktik answers who decides what and why.
OODA answers how decisions are made and updated over time.
They’re complementary but different.