both the motobecane track and windsor hour seem very similar, not sure if you'll notice any difference. both seem to be geared too high, especially if you get the 48-15 with the hour - you may want to replace the cogs for lower gearing. both come with rear brakes, which are not ideal for fixed - you'll want a front brake. both come with flip flop hub with fixed only, you'll need to buy a freewheel if you want to go SS. i personally like the clean / no decal motobecane.

i have a motobecane fantom cross uno, great bike that has 2 brakes, fixed and freewheel cog, and can fit really fat tires. downsides are the ugly decals, too-low gearing (38-16).