Maybe it is to do with the kelvin rating of the lights? Antwan's 2 MH bulbs are both 6,700K, and P44 uses 4x 54watt T5HO PowerGlo tubes, which are 18,000K. So the plant may grow better and have the distinctive smell under a higher kelvin light?
Also the spread of light on Antwan's tank is less than that of P44's tank, because the tank is bigger and only has two MH, and P44's tank (200liters) is smaller but has all those PowerGlos, and has about 1watt of light per liter. The PowerGlos also run just about the whole length of the tank.
Antwan, maybe you could try adding another halide between the other two?