Knell had a higher FG%, 3 pt FG%, 2 pt FG%, EFG%, TS%. Robinson had a better FT%.
Knell had higher rebounds per 100 possessions, assists per 100 possessions, and less than half as many turnovers per 100%. Robinson had higher blocks per 100 possessions, and was barely higher is steals per 100 possessions (1.6 to 1.5).
Knell also got to the free throw line more consistently (based on both FT per 100 possessions and FT per FGA) than Robinson.
Knell was higher than Robinson in BPM, WS, WS per 48, and in Evan Miya's player rankings.
So based on the numbers, Knell is better than Robinson.