I prefer a third flipper so I would probably go with JP. This adds to "shot complexity." Deadpool has 9 shots total: 7 shots from the left flipper (left ramp, scoop, center spinner, snikt, lil DP 3-bank, right ramp, right orbit) and 5 shots from the right (left orbit, left ramp, colossus, scoop, lil dp 3 bank).
JP has pretty much those same shots, plus two from the upper flipper. Left flipper has 7, right flipper has 5, upper flipper has 3 (maybe 4, can you intentionally hit the spinner?). Having 2 u-turn ramps really packs those shots in.
On the other hand, Deadpool is probably more "fun" theme-wise (at least at this point) given the comic tie-in, the humor etc. JP doesn't have those assets.. but I would imagine some sound mods are forthcoming, if not updates from Stern themselves.