Well, 1: Cardinals have more colour then neons, 2: They grow a bit larger then neons so more stricking 3: I believe that cardinals are hardier then neons due to the plenty of inbreeding in neons that have reduced their immunity. Not sure about the quality of neons in singapore, but this is true in the UK.
65g Planted:76W T8, 150W halide, Flourite, 90" of fish, no CO2, no Algae
8g Betta Planted: 11W PLL, Flourescent gravel, Jungle of cabomba, no Algae
29g: Mbuna, Pseudo mbamba, Labido caeruleus, labido Hongi, Pseudo zebra long pelvic, Eheim 2213 filter.