I would not take the flight with the stop, everything else being equal. It's just more safety videos, more ICE commercials, and there's no digital widescreen on that flight. Meal service gets rushed because of the short flight time. I find the direct flight more relaxed (in Y at least). Pax stay onboard at CMB. I've taken it once, and only about 15 pax were flying DXB-SIN, everyone else was DXB-CMB and CMB-SIN.