I test drove a Fiesta and ended up with the Fit. The main factor in favor of the Fit was that it feels like a much bigger car on the inside. The Fiesta hatchback is claustrophobic and is tough to see out the back window. The Fiesta is quieter and has more bells and whistles (Sync). But the Fit has a much more flexible interior. I drive 50/50 highway/city and so far am averaging about 36 mpg. Mostly use to commute but can also fit my (2) kids and all their soccer gear. With one rear seat folded down I fit 4, 6ft soccer goals inside. Manual Shifter is great, and IPod/USB integration is nice. Also I was able to buy it used at a great price while the Fiesta is still new.
High mileage. Great site lines and flexible interior. Ipod/USB integration. Great shifter.
Better sound deadening. Bluetooth, Stability control at all levels. Better storage between front seats. Like many have said, upholstery does pick up a lot of hair/dirt.