(Peak) power to weight ratio:
Corolla 1.3 : 67.2 hp/ton
City 1.3 : 85.2 hp/ton
Yaris 1.3 : 86.34 hp/ton
City 1.2 : 80.9 hp/ton
Also, here are the torque/ weight ratio, both peak and at 2000 rpm:
Corolla 1.3 : 96.8 Nm/ton, (couldn't find torque curve)
City 1.3 : 111.3 Nm/ton, 88.3 Nm/ton
Yaris 1.3 : 108.4 Nm/ton, 92 Nm/ton
City 1.2 : 103.6 Nm/ton, 82.6 Nm/ton
City 1.2 will feel 'slightly' slower as compared to yaris. On the other hand, most people will not be able to notice the difference between 1.3 city and 1.2 city in normal everyday driving. The CVT transmission, if tuned correctly, could even make the city 1.3 better in acceleration than the current 1.3 prosmatic, which is just pathetic.