Well the halide is brighter, which it should be 346w vs 90w, and the leds are a little more blue. As far as growth I'm not sure. Ive only had a saltwater aquarium since January , I've had the halide for around 3-4 months and I've been running the leds for about 6 weeks, so growth is hard to say.
I don't know if it looks any clearer in person, just the way it appears in a pic.
Maybe this can give you a little idea, I happen to have both halide and LEDs so easy to compare pic wise. My corals ( I have a little bit of every type of coral sps
, polyps, shrooms
, anemones, ect) all seem to respond well to both lights.