KB and Baez were the two fastest runners on the team (Baez by 0.8 feet per second, 28.8 to 28, though somehow Statcast has Almora right behind Bryant, so maybe this metric doesn't mean anything). Let's just say they are both very good, if not elite baserunnners, and give Baez the nod for his willingness to steal bases. Bryant is a better hitter than Baez, full stop. In Baez's MVP candidate season, where Bryant had a bum shoulder for around half of his PAs, Baez had a 131 wRC to Bryant's 125. Baez had never been above average in this category until this year. This was Bryant's worst by 11 points. Baez gets the nod in defense, mostly because he plays the premium position...advanced metrics have weirdly never liked him as much as your top flight, or even average shortstops. Maybe that doesn't account for the tagging skills, however you want to quantify that. Of those three, I'm taking hitting, and I think it's the area where they are farthest apart. Then again, both of them should just make all the money and PTR should have to go live on the streets.