Charliecustard.com has 300+ blueprints online which can be accessed through a 3D layer-by-layer viewer. However, for accessing most of these blueprints, a $6 per month subscription is required as there are only a handful of free blueprints available. Additionally, it can be hard to understand the instructions as the 3D viewer doesn’t smoothly go to the next layer.
On the other hand, Buildguides.net has many free structures available with a similiar 3D blueprints viewer. The layers can be easily distinguished and building is made simple with the viewer. Features such as the ‘Measure Mode’ which Charliecustard offers are also available for Buildguides.net.
In conclusion, the sites offer a similiar experience. However, Charliecustard offers almost no free blueprints and the 3D viewer can be confusing for some.