From regular season to playoffs, his PER drops from 16.4 to 13.8. His TS% drops from 52.9 to 49.5. His offensive rating drops from 108 to 101. His WS/48 drop from .097 to .037. He goes from good, to below average across the board. $20 million to get a guy who gives you 16.8 ppg on 41% shooting, for a guy who has given a grand total of 1.9 total win shares in his playoff career.
Now, Amare, in 60 playoff games, and 624 regular season games, goes from a PER of 22.2 to 22.6. TS% stays around the same. Offensive rating stays the same. WS/48 drops by 1/100th of a point. 23/9 on 50% shooting, contributing 7.5 win shares in the same amount of playoff games.
Very distinct difference.