The N-700 has a newly designed front end to make it more streamlined and hold it on the track (I wish they wouldn't tell me things like that). I think the real reason for the new design is because the present model is said by some (see the annoymous comment on the previous bullet train post) to resemble a duck. The new one is referred to as an "eagle". So there! Personally, I prefer the present cab design, but with things changing at this pace, it does not pay to be nostalgic.
Though it has a top speed that is 20 kph faster, the average speed for the run is not up by that much - it only shaves 5 minutes off the 2.5 hours, but comfort is said to be improved (hard to believe) by having the cars tilt on curves. This also allows them to take curves at higher speeds.
In other news....
East Japan Railway Co. on June 24 unveiled a new shinkansen bullet train in the town of Rifu, Miyagi Prefecture that will operate at a speed of 360 kilometers per hour, possibly the world's fastest. The orange "ears" you see pop up to provide air resistence to help slow the train when braking.
Like I said, it doesn't pay to be nostalgic about bullet trains.