geniushanbiao

I noticed that the stock tires have different sizes with different rims. For example with 17" rim it has 235/65R17 while with 18" rim it has 255/55R18. What's the difference between these 2 types(I mean what we are feeling while driving)? My guess is that the 18" one gets better handling while the 17" one gets better comfort. Is that right?