Lemond Fillmore 08 vs Fuji Track 08 vs Charge Plug 09

A track bike is a bike that can be used on the track which could be a range of geometry. As long as the BB is high enough to be allowed on a track then fine. The Fuji doesn't come with brakes, has a track based fixed gearing and a higher BB than a road bike so to me would suggest it is for a track. Not sure why it needs to look a certain way?

Also when you buy one new there is a sticker on the frame that says "This bike is designed for use in a velodrome and is not intended for road use, if you are planning to use this bike on the road..." or words to that effect.