I tend to see this with relative beginners, they prefer the power jerk since it's simpler to learn and there's less to think about. There seems to be a certain point with most people when they start hitting heavier weights where the margin for error with the power jerk becomes too small and they're forced to start split jerking anyways, so I generally have people split jerk from the beginning even if the power jerk feels better initially.
I'm with Mike. There are extremely rare individuals who are genuinely better at the power or push jerk than the split. Usually the preference is due to a lack of experience with the split jerk or having been taught poorly or improperly. It's no accident that the split is used by the overwhelming majority of competitive weightlifters in the world.
You can reinforce/learn a good split with things like split jerks from behind the neck, split push press behind the neck, jerk balances, and obviously just working split jerks with an eye toward proper execution.
You can try combining push and split jerks into a single set, which will help you keep your dip and drive consistent rather than abandoning a vertical drive when split jerking, which is a common problem.
If you can be more specific about what your problem is with the split jerk, we can give you better advice I'm sure.