Either one is appealing to me. I'd ride it mostly to and from work and on short runs out in the country.
Style-wise the Mito is the winner, but the RS125 has a look I like as well - with the exception of the "Spain's No. 1" livery which I don't care for at all.
A major concern is the ability to register and plate it in WI. I don't want to get something that I can't ride legally.
Where would you suggest starting my search? I just sold one of my cycles (1st gen SV) this week, and am saving for a 2-stroke 125 of some kind.