Your best bet is the Kawasaki. Not only is the Kawasaki a higher quality product it will retain more of its resale value when and if you decide to upgrade.
And if you are truly set on a 250cc street bike, from one rider to another, please be careful. In real world scenarios acceleration is just as important as braking, agility and rider awareness, and acceleration is one thing you will not have.
Ride safe and good luck.