Some are "showier" than others, both for looks and for sound. Also some are able to handle higher boost than others. The only number I know offhand is the HKS Super Sequential which is fine up to about 25 PSI. Of course it's always possible to run two, but for your car, that won't be necessary.
Many people choose them for sound, though. Personally, I LOVE my Blitz Dual Drive. sounds real airy, no BS.