This may not even be the correct thread to post this, but just thought to point out;
250 Ninja ~$4500
wheelbase 55.1″, weight 375 lbs. seat height 30.5″, width 28.1″, length 82.1″, 37 mm forks, front travel 4.7″, rear travel 5.1″, 17″ wheels, Steel frame
ZX-R Ninja ~$10500
wheelbase 55.1″, weight 421 lbs. seat height 32.1″, width 28″, length 82.3″, 41 mm forks, front travel 4.7″, rear travel 5.3″, 17″ wheels, Alloy frame
Very clear from these numbers the difference between a 600 cc Hyper-sport and a 250 Ninja is not weight, dimension or rider position. So sitting on them in the show room will reveal little. (take a hunk of sheepskin for the seat of the 250 and I’m guessing they butt test very close) The major differences are cost, frame, brakes and engine performance. One will do ~100 mph in 6th. gear, the other will exceed 100 mph in second gear.
…question is; are you up to riding a road legal motorcycle that can accelerate to 80 mph. in first gear ?