The thing about firing orders is that depending on the manufacturer, the cylinders are numbered either in sequence or alternating between banks, so it adds to some confusion:
Here's an article explaining firing orders and equivalents:
https://www.enginelabs.com/engine-tech/engine/firing-order-swaps-whats-best-for-your-engine/
Then there's the question of V10s, and I wonder what crank configurations differ between let's say the Audi V10 and the Porsche V10(which sounds much nicer)