Originally Posted by OldiesONfoldies
I'm looking for a fast folder and have sort of narrowed to 2 bikes....
Just out of curiosity: are you able to test-ride either of the bikes? IMO this is critical when spending this kind of money, especially since as far as I can tell there's very little adjustment for the handlebar height on either of these bikes. Depending on your height, you could end up with an upright ride that slows you down by several mph. With a Swift or Bike Friday, for example, you can set the handlebars several inches below the saddle if you wanted an aggressive posture.
Other things to consider is that the KHS may be a little bit easier to upgrade and repair than the Speed, which uses the SRAM Dual Drive.
However, it looks like the Speed TT uses higher grade components. The KHS looks like it's mostly Tiagra (which is good), and the Speed TT mixes Ultegra and 105's (which are better). I also suspect the TT is designed more for raw speed than the KHS.
So I'd do a test ride, and if the handlebars are too high to really hammer, consider a Swift or a Bike Friday Pocket Rocket.