Sorry, no help here cuz I love both. But...for what it's worth.
Bw= Great modes, lotsa shots, lotsa tasks to complete. 4 flips including the shark flip that's pretty cool.couple of skill shots, and the theme really draws you in and the music grows on you like some sort of disease.you'll be humming along in no time. Very laid back game in my opinion, but so much to do I don't think you can ever complete it.
Nf= very fun game that is completely fast and furious from the start and dosnt let up. Some very flowing shots that just keep swooping around the playfield without let up. This is not a game to play if your tired from a long day at work cuz the ball travels at blazing speed and you gotta have your wits about you to keep up, one blink of the eye and you crash and burn. The third flipper shot is brutally fast, and if your smoking the herb you'll be left wondering what the f #!# was that as the ball goes by at a trillion mph.some cool modes, that are well defined, and an amazing light show. This game is loud and in your face with no let up, a little juvenile but still alot of fun. Call outs r pretty cool in my opinion along with the music, but I'm sure it's not for everyone.
Both games have some of the better video modes, with one having you jumping sharks and the other driving a motorcycle like the old excite a bike video game. I would highly recommend either, but they r like night and day when you compare them.