Considering that you want an AT, Fuel-wise, if you will still mostly do city driving, mas matipid parin 1.3 bottomline, but with the powershift technology, I would think the difference won't be as much.
Ford is encouraging you to test-drive because it is true that you'll have a more "spirited" driving experience when you get to drive the Fiesta. But it would really depend on your needs. Say if you would be using the car in mostly stop-and-go city driving as you mentioned, and let's say during weekends, more than two people usually ang nakasakay, then the advantages of the Fiesta are useless. But if dalawa lang parati nakasakay then biyahe ka madalas on weekends, then I'd go Fiesta if I were you.
Regarding comfort, depends on how sensitive you really are... Personally kasi I am not so sensitive. I have driven many cars already in my lifetime, among them recently are the old Altis, old vios, 2nd Gen CRV, new Tucson, and the City. Para sa akin, all are at par naman except for the CRV na grabe lang talaga yung tagtag. The old Altis and the City are pretty much the same in ride comfort, para sa akin, mas okay ergonomics ng city, pero mas maingay sa road noise ang City. Comparing against the old vios, road noise is just a little quiter in the City pero parehas silang maingay, but the interior ergonomics is much much better than my old Vios.
Regarding the Accent, I'm advising you to wait for this one because if you will want a practical car, this is again a good option. Hyundai is bragging that Accent will have the longest wheelbase in its segment, this means supposedly bigger cabin space. Trunk space is at about 450 liters, which is also big. The looks/design is Sonata-esque, which looks good in my opinion. And the engine specs is also pretty darned good, wherein the 1.6 will give you about 120hp, and the 1.4 will give you about just above 100hp. Medyo "eeehhhh" lang nga ang tranny as Tidus mentioned, but I'd take this in a heartbeat if the pricing is what I expect it to be. Hyundai did good with their pricing of Tucson and Sonata (most recent releases), but did bad with their i30... I trust that HARI learned how they can emerge as a #2 car brand in the Philippines if they just do the pricing right with the new Accent and the new Elantra.
I would've waited for this kung sandali lang yung hintay, but my budget dictated that I had to buy a car three months ago pa kaya nawala ang new Accent sa choices ko.