Well the acceleration has been great, It could easily top my old Wingroad in that dept. I did a run up through hilly terrain with 3 people (2 large, 1 medium), a full luggage area and more camera gear and baggage on the rear seat and overtaking wasn't a problem at all. The 1000CC has much less power, but can manage, I couldn't take all the noise it made though, so annoying. As I got the car, I was on baseline road and I got to that hill (coming back from wattala on the way to Borella junction, you know it right?), well I was at 40Kmph at the bottom and accelerated to 3500RPM and was at 100 when I got to the top.
The differences are mostly cosmetic, but there are some versions with mechanical mods, for example mine has TRD suspension, but there are others with TRD exhaust, some have tiptronic and throttle sensitivity controls. The non-JDM (Yaris hatchback) has a turbo in the RS version.