Once you start considering the Jazz, you should also begin to include the Altis 1.6G and the Elanta 1.6 GL. They're both bigger, though the Altis isn't necessarily more spacious in terms of legroom, but it's wider and much more comfortable to be in. The Elantra has way more passenger space than either the Jazz or Altis.

The 1.5 of the Jazz isn't all that efficient, and can be beaten by the 1.6 1ZR-FE of the Altis, even when paired with a crappy 4-AT. The 1.6 of the Elantra is no slouch in terms of fuel efficiency either.