I've played both and at those prices DW is clearly the better buy and better game in my opinion. The average price for a DW these days up in Canada is around $1600-1800 in nice condition. My friend Kev took this video of his PF which he just fully shopped before he sold it for $800cdn so $1500usd is way too much.
As you can see in this video it is all about the center ramp shot which dominates the play field. I think I hit it 12-15x in a row my first time playing it cause it feeds back to the flipper. There are some neat things such as the way multi-ball mode starts with the police car, which was suppose to the Batmobile but I guess Williams couldn't secure the license so they had to re-theme it to something generic. The siren topper is cool and can probably light up a room as much as F14 or HS. Also if your first two balls are miserable and on your third ball you hit the right ramp twice you can steal the highest score so make sure you go last.
While you are on my friend's channel check out his other vids, his latest one with Q*bert's Quest is pretty cool novelty game and I think he forgot to hook up his tilt bob