ArkyKenny on 9/9/2013 8:34:27 AM:
Either bike will do just fine. So will any number of other bikes. The Katy is not real demanding--it's a flat rail bed with a hard surface, and good shelter from the wind.
Anything you spend more than $400 on will work great, stay adjusted, etc. I personally think a hybrid with 32s or 37s is the best way to go for most people. I say start there. Then, if you get Into it, go buy what you want once you know what you want.
More importantly, spend as much time as you can on your new bike before you get to the Katy. Adjust it. Tweak it. Make it fit you. Get in shape to ride it. Learn how to drink when you are not thirsty, and eat when you are not hungry so you can ride as long as you want to ride. Make sure you can fix a flat, and adjust the tension on your new shifter cable (or bring someone with you who can). Buy a chain tool and a master link, and know what to do with them too.
Those things, not the type of bike you have, will make it a great trip