Further to what @Zoomer mentioned above, these engines are totally distinct,
the DDiS 190 Diesel Engine is very powerful and delivers high power and high torque at very low levels of noise. The fuel efficiency and performance is exceptional. The emission levels are also pretty low.
Even the 1.2 L V V T Petrol Engine is very powerful and is available in 5 speed MT and CVT. The torque is on the lower end but has exceptional power. The emissions are low, combustion and engine friction are also low in this engine.
The 1.2 L Dual jet, Dual V V T Petrol engine is relatively new and is the first in this segment. It provides better fuel efficiency, lower emissions, and better combustion. It is said to revolutionize the driving experience!