Booker so far this season (age 21):
24.5 ppg on 19.0 FGA, .459 FG%, .389 3FG% (6.5 3FGA), .873 FT% (5.3 FTA), 4.5 rpg, 3.9 apg, 0.9 spg, 3.3 topg
Bryant in his fourth season (age 21):
22.5 ppg on 17.9 FGA, .468 FG%, .319 3FG% (2.2 3FGA), .821 FT% (6.1 FTA), 6.3 rpg, 4.9 apg, 1.6 spg, 2.8 topg
Bryant did a better job of filling the box score, and was a better defender (although that's harder to document statistically). They get right around the same number of shot attempts, if you figure in Bryant's greater number of trips to the line. Booker's three-point shooting is a real weapon, whereas it wasn't for Bryant at this stage.