The Maruti Suzuki Grand Vitara AT will prove to be more efficient, but the gap will not be all that large. Sure, the mild hybrid setup does help, assisting the engine and reducing load. But the bigger benefits come when the engine stop/start is also used. Engine stop/start automatically switches the engine off at long halts and restarts it when you are ready to move, in the interest of saving fuel.
Trouble is, the AC compressor also goes off with the engine, so on a hot day, you'd rather leave the feature turned off. Do note, engine stop/start is a feature you'd find on the Hyundai Creta IVT too.
The Grand Vitara should be more reasonable in terms of maintenance and service costs, though.
Strictly speaking, on product attributes, the Creta IVT is a superior package. It's got a smoother gearbox, better performance and is also roomier than the Grand Vitara. The Creta IVT in base EX(O) trim is pricier than the base Grand Vitara AT Delta, but would still be our pick if you don't mind the stretch.


