The main difference is the colour options and fabrics.

The V4 comes in three colours, whereas the V3 comes in a choice of 5.

The hood is slightly different on both - the V4 has a two-point fold and is made of a thicker material.

The V4 also comes with an added luxury carrycot liner.

Here's a link to our comparison chart which might help: https://www.icklebubba.com/product-info-safety/product-comparison-chart