Dan C
Honorary Master
The A4 is only about 5cm wider than the Jazz (granted probably measured at the mirrors) so not sure how much real world space there would be inside.
Also the A4 has more sporty rear seats (bucketed left and right with hump in middle) while the Jazz has more of a flat bench.
So it could result in being much of a muchness.
The Jazz is also taller which makes it easier to load into than the A4. It's after all the most wheelchair friendly car out there for this very reason.
Agree here, the Jazz will give you much more room than the A4 actually.