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[quadraphonic]

Yaris is more akin to the Vitz or Echo H/B. Essentially the same car with the hatch body on it. It's equipped differently depending on what country you buy it in (UK has 1.0, 1.3, 1.5L engines plus a diesel version, etc.)

Echo is also known as the Platz (Toyota Japan).

However, as I said, same car, different body.