Yeah so I did say his age and shooting was a concern.
However to your other point, Per 40 according to DX, Grant leads Booker in Assists (6.8 vs 2), FTM (4.2 vs 2.6), steals (1.8 vs 0.8), FG% (49.4% vs 47.7%). Rebounds was even at around 3.
Those stats are not updated.