Well, as I see it, you've answered some of the question.
It depends on whether you place emphasis on looks over performance and rideability.
Ultimately, a litre bike is better. It's not for the power... It's the torque. A litre bike makes more torque at 4000 than any 600 period! It's the torque that makes them fun and easier to ride every day and on the street...
Which litre bike you choose, we all like different things... Best you ride them and choose for yourself.
PS, last years graphs...
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