Ok so if you read my comment, I said the owl has the advantage from above but not standing side by side on the ground… it’s not like the owl couldn’t win but it’s not like the cat couldn’t win either. And 4 times their own size? How much does that bird weigh? 4 lbs? I once had a cat that weighed no lie almost 20 pounds, but she always weighed at least 18 lbs. she was an inside outside cat and she would catch everything, she would eat that owl for breakfast

Edit:

She was so unbelievably fat, she ate everything, but she was nimble on her feet, she was vicious about food but was a very loving cat, she would bring home a bird or a squirrel on a weekly basis to show her affection for all the food we constantly had to feed her