I just replaced my csvt with a zx5svt a few weeks ago. I like it.
Interior:Bigger overall. A 4 door+hatch is what i've been waiting for so the change was planned in my case. Some prefer a trunk. Fit and finish is prolly a wash. Some switchgear sounds cheaper than the C, more leather on the c and more power options on the seats. But there are enough added stuff on the F to make up for it - like side impact airbags, kewl pedals, better steering wheel etc
Exterior: Pretty subjective. I like both. Just needed a hatch. The F has 17's FWIW.
Drivetrain, handling: Haven't pushed the F much yet but it had impressive numbers on the cones for those who magazine race. But I cannot really compare yet. I know the C handled really well and I miss the c's overall power off the line, no contest there. v6 vs 4cyl. is an apples to oranges comparison anyways, for the most part. The sounds are different, the responses are different. The 6 speed of the focus is nice. Not having to muscle the c's stick into reverse(or worse do a restart in a busy parking lot) is something i'm not gonna miss LOL. Parking and manuvering the focus in tight spaces (ie DC streets and parking lots) is a breeze but we all know the legendary wide turning radius of the C
. From what i've read, the F's clutches are fragile. But the C has its own share of fragile parts - ie waterpump.
I can go into more comparison observations if you want. Just pm or email me. Motorcity has had his much longer though so get plugged in with him.
From what i've read in the various focus boards, there are lots of options modding wise...
oh..i get better mpg's FWIW, so far. My c had always been around 21-23mpg's. The f is doin 24.5-25.5 mpg. Both on premium gas.
DD