This thread should have more action because this is a really good question... not everyone has $17k to buy both.
So I've played BOTH! Here is my opinion WONKA.
Why?
Artwork: JP artwork is NOT the best Stern has ever done by a long shot. I would rate JP artwork a 6 out of 10. Wonka artwork is probably the best artwork JJP has ever done. 8 out 10. Winner: WONKA
CGI Screen: Clearly there is a winner here and that is WONKA all day long. One game has movie clips the other doesn't. Furthermore JJP is heads and tails better than Stern at screen graphics all day long. If we ranked the 5 best screen work done for a pinball JJP would take all five spots. I doubt even the biggest Stern fan wouldn't deny that. With that being said JP its hard to say if its good or cheesy. The work looks like something you'd see in a lego cartoon, but on the other hand its the best CGI work I've ever seen done by Stern. It really depends on what you're going for here... I really like how Stern made it like a game on the screen. I give Stern credit for doing the best they could since they couldn't use one ounce of movie clips. Wonka 8 out of 10 JW 7 out of 10. Winner WONKA
Theme: You have to give Wonka the win again because JP isn't really JP ... you could make the case they shouldn't even have licensed this movie and just done their own DINO Theme. Why not? Save the money. There is no real tie in to the movie other than they got to use the music, otherwise its just an original dino theme game. While Wonka is based on one of the most beloved movies of all time, uses call outs, movie clips and more. I like some of the things Stern did with JP, but its not that far off from most Stern games. I think Stern did a good job without being able to use movie assets.
Stern 7 out of 10. JJP 8 out 10 WINNER WONKA
Theming: So who themed the game better? That isn't even fair, Wonka by a long shoot. Stern couldn't use anything from the movies, everything about the game is just original looking artwork they created. When you look at the Wonka game you believe you're in the World of Willy Wonka and with JP not as much. I think both games are going to lend themselves to really cool mods, and I almost have to hold off until I see what mods come out for JP. I think Stern put more into this game than most others games they've made, but its still not on a JJP theming level. Wonka 8 out of 10 JP 7 out of 10. WINNER WONKA
Gameplay: Both games are very interesting. Both have a lot going on. You have the best there ever was Pat Lawlor doing Wonka, and the best pinball player in history doing JW. Both are good but I think the real pro here is JJP finally made a pinball players game with Wonka and included all the cool theming aspects on top of that. I'd say both games are have good gameplay. Tie 8 out of 10. WINNER TIE
Durability: Stern wins and will always win this category. JJP makes their games so custom they sometimes learn their mistakes after players bash them around some. Stern games are always tanks. JJP usually feels their way thru by the time the CE comes out, while Stern games are usually ready to go day one. Stern 10 out of 10 JJP 7 out of 10. WINNER STERN
Sound: I think everyone would agree JJP games are better overall on sound quality. They include mechs on the outside of the game for headphones, turn audio on or off, and JJP games are just using amazing sound equipment. Wonka also has so many sound FX for almost every part of the playfield, the sound fx are sick on this game. JJP 10 out of 10 JP 8 out of 10.
Toys: Both games have some really fun things going on... Wonka wins again with the spinning gobstopper, the mech right below it, wonkavator, wonkavision, etc. Although Stern tried to do some fun stuff the main thing that stands out is the T REX on the LE that throws the ball around. The jeep is kind of cheesy, the Raptor trap is nice, the spinner copter is nice as well. Wonka 8 out of 10 JP 7 out fo 10.
Lighting: This is a real problem for me on Lighting. Wonka I think is poorly lit ... I can't hardly see anything in the back of the playfield while Stern's game is very bright. Winner JP 9 out of 10. Wonka 7 out of 10.
Overall Lastability: I think we've seen that JJP games hold their value more so than Stern. There is a lot of reasons to this... for one the people who buy JJP games typically are collectors, while Stern games get more players. JJP has proven not only do they hold more value overall. I think 4 or 5 years from now a DINO themed game will be just that a DINO themed game, while Wonka is more of a collector type deal. A real gobstopper from the movie sold for over 1 million... this movie is like Wizard of Oz. I think JP movies are like popcorn flicks and have very little colllecterer market for that movie franchise. Their toys, blah, blah aren't collectable. I think a Wonka LE 5 years from now will still sell for $7500 to 8k, while the JP will be in the 6's just because of the theme. The other issue I think with most Stern games is they make so many more titles, so its always onto the next one, three or four a year, while JJP has a tough time doing one per year. So JJP will always be worth more. Stern 7 out of 10 JJP 8 out 10. Winner Wonka
Overall Winner: Wonka 80 to JP 76
Final conclusion: Both are good games, people are going to like both for different reasons. I stress I'm coming more from the collector side of things, so typically I'm always going to like a JJP game better because from a theming stand point they're better. However I really think Wonka is a players game with great shots, something most other JJP games get ripped for so I think with Wonka you get the best of both world.
To me Wonka is the winner. As for JP honestly I'm not that excited about the theme, because I don't really care that much about dinosaurs. I will say however I do care about Sterns next game, ELVIRA! I'm already super excited about this... and for me a Halloween guy I can honestly say I'm more excited about that game than ANYTHING from anyone.
Bring on Elvira!