decision paralysis

I'm a beginner and I mostly shoot wildlife with G9 and Panasonic 100-300. I only shoot stills, no video. I've found a good deal on OM1 + 100-400 Olympus and G9ii + 100-400 Leica mk1, and they're essentially the same price. I plan on selling all of my M43 equipment except for my Oly 12-40f2.8 for this so I'm leaning slightly towards the OM1. I know they're both great cameras and I really can't go wrong with either, but which would you chose?