push presses and jerks are not the same thing btw.
Is the difference between them the act of splitting?[/quote]
no the difference is you reverse the order of hip lockout/arm lockout. pp you lockout hips before the arms. jerk you lockout arms before hips.
pushpress: the knees bend once, legs drive up to hip lockout, then the arms finish the lift to lockout.
jerk: the knees bend twice - once to start the drive, again to drop under the weight as you simultaneously press, lockout arms, and catch the weight over head. then you stand and lockout the hips. same idea whether you do split-jerks or push-jerks(no split).
you should work on the your technique and speed. usually the clean is the hard part. you should be stronger in the jerk than the push press.