here's my opinions on them, being that ive used both. id say overall, theyre pretty comparable fixtures
- build quality seems to be the same on both
- Nova has switches for the lights, Hagen doesnt. this is a BIG deal for me
- both use cheap thin aluminum single reflector for both bulbs
- Nova has a fan which is fairly loud, and requires an extra outlet
- Hagen has sealed bulbs, Nova uses a splash shield
- Hagen is a lot more bulkier and taller, Nova has a slim profile
- Hagen has built-in clips for hanging the light, Nova does not
- Nova you can run with one bulb only, Hagen you cannot, it wont fire up. This is pretty important, as Nova gives you more flexibility
i dont think you can go wrong with either fixture. just depends which one you personally like better.