Quoted from NPO:I would say, in terms of gameplay, JM destroys JP. JM has so many shots going for it, whereas JP as 1 ramp and 1 "ooohhhh ahhhhh" toy being the TREX.
Just for the sake of discussion (and obviously IMHO)...
I think your short selling the number of shots on Jurassic Park. Just with the lower flippers from left to right...Bunker (Scoop), Visitor Center (Loop / Pop Bumpers), Control Room (Scoop), Mosquito (Captive Ball), Raptor (Kickback), Ramp, Power Shed (Scoop) and Boat Docks. Then with the third flipper you can add the Helicopter (Loop) and T-Rex. Plus, all of the different dinosaurs targets you have to collect to start multiball.
With Johnny Mnemonic there are the Left Loop, Left Ramp, Crazy Bobs, Middle, Spinner, Right Ramp and Right Loop. Plus, the two side targets. Probably more to your point though the shots do flow better on Johnny Mnemonic.
My ratings...
Jurassic Park
8.159
Johnny Mnemonic
7.811