Well, you didn't specify which year of either car, but in general:
Performance:
- Acceleration: even
- Handling: NSX
- Braking: Porsche
Other:
- Purchase Price: even
- Cost to Maintain: NSX (except for tires)
- Styling: NSX
- Ergonomics: NSX
- Reliability: NSX
- Exclusivity: NSX
Try driving both of them, and then decide.