Why shouldn't the Jekyll backend more than a Wicked? The Wicked will handle more oil than a pearl, the Jekyll. A pearl will always hook more (or appear to hook more) on its appropriate oil pattern. I'd suspect your Wicked can be used on heavier oil than you ae curently using it. On that heavier oil, the Wicked should hook more and the Jekyll should struggle to make the turn. This is a classic case of solid (even when it's polished) vs an apparently equivalent pearl.
IN THEORY, the Jekyll should take over when the Wicked won't clear the heads and/or the midlane. The Wicked should be used when the Jekyll is struggling on too much oil or on carrydown. They should be a pretty fair one-two combination, although the Jekyll/Hyde ot the Jekyll/Wicked B/R/T might be better. A slight scuffing of the Wicked's cover might make their differences easier to see.
--------------------
"Just because you can do something does not mean you should do it."
"No good deed goes unpunished."