Witt was twice as good by WAR and showed way more explosive tools
Witt 2021 --> 100th percentile sprint speed and baserunning value, 75th percentile arm, 69th percentile xSLG and 65th percentile Avg Exit Velo, upper tier bat speed
Holliday --> 25th percentile bat speed :( , 26th percentile arm strength :( , 5th percentile range , somehow 8th percentile baserunning against 82nd percentile sprint speed to he's a dumb baserunner
All Holliday has shown is a decent approach (chase and squared up type stats). I think he could still be a 4 WAR player or something like that in some years. Lots of work to do though.