I've only owned/ridden steel (Reynolds 531) bikes, but will offer an impression anyway. I test rode them both recently also. I thought the Trek 5200 had the smoother, plusher ride, but that the Talon did feel livelier and stiffer; more of a pure race bike.
As David says, tires and inflation make a difference; believe the wheelset does also. On the 5200, the tires were inflated to 100 psi, which is what I requested. On the Kestrel, they were 110.
Despite all that, my impression is that the Talon is Kestrel's TT or race bike. The 200, which looks more like the Trek frame, is described in the Kestrel brochure as having the great ride.
I also test road the new 2300 Trek; AL with carbon seat stay, and actually preferred that ride. It felt "plush" over the course road surfaces, but seemed a bit livelier than the all carbon Trek. Being new to carbon, I was amazed at the smooth ride damping of the Treks, and also surprised that the Talon felt harsh...about like my current 531 frame/fork.
Again, these are quick impressions based on 5 minute test rides. As much as I liked the 2300 ride, have decided to go with a Al/carbon rear frame from a local builder for the new bike.
Agree local warranty support is important. However, note that Trek's written warranty does exclude "wear and tear", ie fatigue damage, just like Cannondales and the other big manufacturers. Of course, this is realistic....no sub-3 lb frame is going to last forever for a high-mileage rider or racer.
Dan