Get the MarsAqua and you'll be much happier in the long run. You have an 18" deep tank and the Current fixture will probably work OK. At 24" deep they are under powered. See the wattage of the power supply, well, divide that by the number of leds and you'll find you are running about 0.5 or 0.7 watts per led. Do the same with the MarsAqua and you'll be at 1.88 watts per led. Try some of the other Chinese fixtures and you'll find they are at 2.2 watts per led.
Even the Current webside shows the pathetic PAR they put out, and then they say the really low PAR values will grow zoas and softies... not so much.
I only offer you this because I have a PAR meter and have helped out a lot of people in our local club. A few have had Current and Marineland fixtures and struggled to grow coral well. They upgraded and what do you know... coral growth!