I'd say it depends on drilling and surface (if changed, that is).
In stock form the Rampage handles as much oil as the Saturn, but the ball path is radically different.
Maybe y'all forget that PK 18, pearl or solid, is a VERY Strong reacting ball, handling TRUE medium oil patterns, exactly as does the Saturn, even with its 800 grit surface.
The Rampage may handle less oil than the Saturn, but that is solely by means of its pearlized and polished cover. But the Rampage will also handle the same amount of oil as the Saturn.
If you put the Saturn cover in the Rampage's core, YES, then, it will handle more oil, BUT the Saturn is not in the Rampage's core.
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"None are so blind as those who will not see."