It is funny how these two get compared so often, and probably a tribute to the Concours that it is compared. The Concours feels massive when you climb on after being on the Ninja. Not to mention passenger accommodations. The Ninja does have a seat and pegs for one, but barely. Still, I love it.
I think my drivers license will as well. I've been riding the concours as my only streetbike for the past 6 months. I had an sv650s that was modified, but it just did not work very well coming off the c14. No brakes, no power, great handling though, and light. At least it was supposed to be light on a scale. BUT, the fuel was positioned so high, and the bike set high. It had a very uncomfortable feel to it at low speed and the bars seat, and pegs, were all wrong. The c14 was is smooth, comfortable, and relaxed feeling (at any speed) that I have to really watch the speedo carefully. The ninja has that feeling of speed where 80 miles an hour feels like your moving.
The Ninja has a v twin like feel at low rpm's. WAY more torque than an inline four is supposed to have. I hope the ninja front brakes break-in better, or I'll have to get some different pads. So far, they are not as strong as the c14. The master cylinder is the same, but it has Tokico calipers instead of the Nissin.