They all have three stripes, a low profile and a retro feel, so it is easy to mix them up. Here is the difference in plain words.
Samba
The slimmest of the three. Look for the T-shaped suede overlay on the toe and the gum rubber sole. It sits close to the ground and looks sharp with jeans, wide trousers and skirts. The Samba Jane adds a Mary Jane strap for a softer, more feminine look.
Gazelle
A suede upper all over, a slightly thicker sole than the Samba and no T-toe. It feels a bit softer and comes in lots of colours. A good pick if you want the retro look with a little more cushioning.
Campus
The chunkiest of the three, with a wider shape, padded collar and thick sole. It has a skate-inspired feel and works well with baggy fits.
How do they fit?
All three fit true to size. If you have wide feet, the Campus is the roomiest.


