speed, power have been the top notch since bikes emerged ...
but for city useage the requirements differ at large, ask a daily bike user who goes to office use it for family comuting and wanders around on it with friends and once in ablue moon goes on tour ... does he wants only power and speed ? DUH!
if you Ask me to compare a Kawasaki Super 100 to Honda CD 100 then listed bloew are the things which I will consider just like any city bike user?
I need latest Rocket science to give me SUPER DUPER GOOD fuel Average (think of a 2stroker here),
I need full floating suspension, (its equalant in both)
I need long life Engine, (2strokers DIE away 1/4 life of 4stroker if 4stroker lives 20years 2stroker dies in 5years)
I need no Plug shorts, (think about 2stroker again)
I need no Smoke cloud on my tail, (and again)
I need longer vehicle and its base for good all season grip and more sitting area to accommodate when we are three and bike is one, and yes I need it to be reasonably powered too so that I can visit Monal and have tours with bikers too...
And it would be SUPER Awesome if Bike looks HOT too with all the latest curves in bike shape and equipped with super latest equipments and gadgets..
Now I think you all know the clear winner, because not every body would like to ride a previous century bike...
TWO strokers were good in there times when we had no traffic on roads, ab tu sarak per jaga nahi milti chalanay ki bhagana tu dur ki baat hai... and plus the Smoke, less life, fuel, aging bike, old tech... long list ...