IMHO, it's a mistake to make your choice based solely on the magnet type. Great pups and bad pups can be made with either. Besides that, there are different grades of magnets within each material class so you need to consider that if you want to make a judgement based on type. Manufacturing quality makes a big difference too - does the factory take the time to make sure the 'great design' is implemented repeatedly and close to the intended quality?
If you're particular about pups, you're better served by reading the manufacturer's write ups to see what kind of tone they're attempting provide, choosing a couple that are in line with what you want, then polling folks who've tried them to see how good they perform in 'the real world'.
