@Poster it depends upon the condition of civic 1stly that is it old shape or new shape 2nd is it vti with full options or EXi 3rd thing is its milage brother, i think your vitz might come on road in 2006 or odd and civic had been on road since 99 because its local manufactured,
plus i think civic's 99 and vitz 99 both maintaince are equal,Civic has more grip than vitz,it has 1600cc Vtech Honda Technology while vitz has 1000cc VVT-i japnese technology with fitting/fixing,civic has Big Trunk,big sitting room excellent grip,vitz has almost the same sitting room and on higher side than civic,but its without DIGGY,
the other facts are that agar vitz shuru sai aap k paas hi hai to in my oppinion you should keep it you must be aware and in touch of its everything right as compare to the new car which you are going to buy,but depends upon condition and the loyalty of the seller that he tells you everything about it;) or you must make it check from experienced EFi machenic with denter,painter;) brother
GOOD LUCK