No doubt about it. Swift will sure win, perhaps with good margin, for sure but still - I mean, after looking at the Yaris's power-to-weight ratio & also having Swift at home, this was the first thought that came to my mind.
Not to brag about it, but I've given tough times (i.e. staying almost always head-to-head) to 1800cc corollas/civics of friends/relatives in friendly drags up-to the speed of ~120 at a number of times, so no, Yaris can't stand the chance but looking at the numbers, I'm excited to test it.
FYI - I have taken a test drive of Yaris 1.3MT for solid 3 hours (& about 100 km), but couldn't floor it as it hasn't completed even 200km at that time, otherwise, we would have a comparison by now.
BTW, here's my swift I'm talking about.