I think each of the cars you mentioned belong to same C class but characterstic of each car would be different. Have a look at the technical specification for all-
Fiesta 1.6SXi- Will suit you best if you love driving. Inside Space would be at pemium and exteriors does not have an oomph factor. The car will solve only one purpose, it will satisfy your driving needs. Fully loaded SXI with ABS
, Airbags can cost you lesser than mentioned price if you can bargain.
Linea T-Jet- Will have all the good qualities of fiesta with additional power and addicting Torque. I bet it will make our lips go wide, everytime you drive it and Torque can push you back in the seat. Fastest in C class between 20-100. Also an ideal vehicle if you want to be chauffer driven. But don't expect TASS to do more than servicing. Niggles can be incurable at authorized pit stops.
Hyundai- Practical family sedan, good looks, best in class interiors. Good ride below 80Kmph, loaded with features, you can get an AT Verna at the offical price of T Jet plus.
Negatives- rear seats are low down and fluidic design compromises the visibility of the passsenger. Ingress is not that easy at the back and catastrophic features can make you wish for more airy cabin. High speed ability is compromised with soft suspension but brakes are excellent.
Honda- In addition to what you mentioned, it's still the fastest car between 0-100 Kmph. Mid range acceleration is not as great as high and low end but not bad either. Ride could be not as perfect on uneven roads, mainly due to low weight (1100 KG) and suspension. Handling is accurate and precise. Rear space is average with ok ride quality (Not as good as for the front passengers)
SX4- Its average on all fields except acceleration which is comparable to City upto a certain extent. Visibility is not too great from inside and rear hump is bad for 5th. Ordinary looks and average fit and finish make it a laggard even for Maruti. Ride quality is avarage to bumpy.
So decide, which of the above features are most wanted for you and decide accordingly.