Let's go to Synergy and see -
Over 36% of Drummond's offense comes from put backs. In those situations he scored 1.05ppp (point per possession).
13% of Davis' offense is from put backs. In those situations he scored 1.27ppp.
The next highest for Drummond was on cuts. Which accounted for 20% of his offense. At a rate of 1.32ppp.
10% of Davis' offense came from cuts. At a rate of 1.24ppp.
The next highest amount of shots for Drummond came from Transition. 14% of his total offense. At a rate of 1.22ppp.
9% of Davis' offense came from Transition. He finished at a rate of 1.53ppp.
The next highest for Drummond was on Post-Ups. 11% of his total offense. At a rate of 0.71ppp.
14% of Davis's offense came from Post-Ups. At a rate of 0.88ppp.
81% of all of Drummond's offense came from these 4 different areas. No other area does Drummond have over 10% of his offense.
Davis on the other hand has 6 different areas where over 10% of his offense came from. He also had multiple areas where Drummond had less than 1% or no attempts of his total offense from. Davis had attempts from Isolation, Spot-Up, P&R Ball Handler, Off Screens, and Hand Offs. His offensive average out of those sets was 1.02ppp.
Out of 8 different offense plays that they both competed in AD beat Drummond on PPP in 6 of those 8. The two areas Drummond beat AD in was by an average 13.5% better. The 6 areas AD beat Drummond by was by an average 18.4% better. Meaning the areas AD beat Drummond in was by more than the areas Drummond beat AD in.
When you combine this with the fact that only 4 different plays accounted for 81% of Drummond's offense it's clear that AD is more skilled than Drummond.