come to think of it, if a person is really struggling between these two different cars which happen to be in the same price brackets, then he must have other considerations other than the sole aesthetic part of it?
For me, if i were put into your shoes, i'd get the Citra for the sole flexibility of it. But for myself, i will and would not even come to think of a citra. A friend of mine asked me this same question before buying himself a Vios. I asked him :" What the fuck do you want a Citra for? " carrying multiple seats with you all the time?" This is due i know of his usage, the struggle part came when one considers too many aspects such as while travelling, or suddenly would love to lug his tv or fridge on tour with him whatever ....
My advice, buy only what you need. and if all you need is a car, what for a family carrier? you married? if not, then its a sin to buy a citra. kekekekek~
Oh, Vios certainly has low fc, citra? dunno, never drove one. :)