'better' is subjective, but forced induction masks the benefits of a small increase in displacement.
The SR has various design features that are ideal for turbocharging that the KA lacks - from strengthened internals to turbo-optimized cam profiles. It also has a better flowing head and a higher redline.
But there is that 20% increase in displacement...
It goes both ways - It's all preference. Torque versus revs, cheap parts versus less maintenance, etc.
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