The word "elite" is being thrown around too readily to describe players here.
There is gargantuan difference in offensive ability between Kareem Abdul-Jabbar, Wilt Chamberlain, Shaquille O'Neal and Hakeem Olajuwon ... and the rest of the talented scoring centers.
Ability is relative to your competition.
Hakeem, Robinson, and Ewing all played in roughly the same era.
Robinson's best two seasons:
29.8 points on 51% FG% (in 40.5 minutes)
27.6 points on 53% FG% (in 38 minutes)
Ewing's two best seasons:
28.6 points on 55% FG% (in 39 minutes)
26.6 points on 51% FG% (in 38 minutes)
Olajuwon's two best seasons:
27.8 points on 52% FG% (in 40 minutes)
27.3 points on 53% FG% (in 41 minutes)
In terms of pace, the Rockets generally played at a quicker pace than the Spurs or the Knicks.
Based upon all of the above, Hakeem was a similar scorer to Ewing and Robinson. Hakeem may have had more post moves, but Ewing, Robinson, and Olajuwon were all equally effective as scorers at their peak.