Well, of the three versions of the 'spaghetti bowl' Premier coasters I have ridden (SFA, PKD, PKI), none of them is what I would consider "headache free". I think that JJ @ SFA is the least migrane inducing. Additionally, JJ has no stop on the midcourse (come to think of it, since they only run two trains, I dont think there is a midcourse. However, to answer your exact question, I agree with Jeff, the PKD & PKI versions are identical.
jeremy
---- Sign seen on OTSRs: "Bang head HERE"