Mike Lane: Comparing the Panasonic Lumix G9 Mk2 against the OM1 for wildlife photography. Which is best?

Mike writes:

Two great cameras compared. With the Lumix G9 Mk2 now having phase detection AF these two cameras are now in the same ball park. Each has its advantage and disadvantage.
It is hard to know which one to choose, but I try and make the call.
In some situations the OM-1 had the advantage, but in others the G9 Mk2 is way out in front.

The G9II i at BHphoto, Amazon US&EU, Adorama, Fotokoch, FotoErhardt, WexUK.
OM-1 at BHphoto, Adorama, Amazon. GetOlympus. Calumet DE. Fotokoch DE. Wex UK.