First Lets Compare the Engine OF the two cars.
Suzuki G-Series Engine came out first in Mid-80s associated with what we call Nowadays "Suzuki Khyber". Perhaps it was a ground Breaking release and success of Suzuki Followed. Suzuki Made the engine completely out of Aluminium, Resulting in light weight BUT the engine gets damn hot very easily and Gasket replacement follows. But Although these engines do not produce much HP, they have good amount of torque! Now we compare the Carburetor engine which is Suzuki G10A & the Efi Engine G10B.
Lets take a Look at the 993cc Carburetor 3-Cylinder G10A Engine:

As you can see, It is a pretty simple Engine with only 3 Cylinders and Ample room. I like the simplicity as much as the local mechanics do, because they can easily repair this simple but reliable engine. A large black Carburetor intake is seen Attached to it which is a bigger size than we usually see.
Power Output : 48 hp (36 kW) at 5,100 rpm (um...)
Torque : 77 N?m at 3200 rpm (wow!)
Compression Ratio: 9.5 : 1 (reasonable)
Now we take a look at the 993cc Efi 4-Cylinder G10B Engine:
Now, we see that this one is quite an improvement with 4 cylinders, A larger Engine Head And ample room because of lack of Carburetor Filter/Intake. Again Mechanics love this arrangement, But Efi cars are no joke to them. They learned out of experiments and wrecked a few cars also! Overall A Better engine with Few improvements.
Power Output : 55 hp (41 kW) at 5700 rpm (better...)
Torque : 79 N?m at 3200 rpm (nearly no change)
Compression Ratio: 9.5 : 1 (reasonable)
Now You Guessed it Right, the winner is G10B Engine of Efi Cultus, Not only because of more power, but also because 3-Cylinder Engines are slightly unstable and they Vibrate Vigorously. Our Carby one is at 150,000 and you must see how violently it is shaking while Indling. Result? Whole car shaking and nuts needing Tightening...
But! The competetion is on... and lets see if our Carby Cultus if up to some good or not...