This guy calculates a "bow index", and reckons European Yew and Osage Orange are in a dead heat:

https://www.wood-database.com/wood-articles/bow-woods/

But in the comments, someone identifies "speed of cast" aka "self-fling speed" (!) as the key metric for bow woods, and he doesn't have European Yew, but according to that, Pacific Yew and Osage Orange are also pretty much the same!