Which rookie postseason star is the real ROY?

This year's NBA Rookie of the Year debate, one of the most fiercely contested in some time, has continued raging well after awards ballots were due two-and-a-half weeks ago.

While most rookies either play small roles for contending teams or put up bigger per-game numbers on lottery-bound ones, Donovan Mitchell of the Utah Jazz and Ben Simmons of the Philadelphia 76ers have been driving forces in their teams' advancing to the second round of the playoffs.

As Mitchell and Simmons continue to shine on a bigger stage, let's revisit the question: Who has been this year's most valuable rookie?

Offensive value

The case for Mitchell as Rookie of the Year centered largely on his leading role in the…