The main difference between the "Atlas 150/AT-150" pasta machine and the "Atlas 150 Classic" from Marcato lies mainly in the aesthetic and additional features:

## Colours and design
- The "Atlas 150/AT-150" or also known as "Design Atlas 150" is available in different colours, such as red, blue, ice blue, black, green, copper and pink. These colours are applied to an aluminium outer material.
- The "Atlas 150 Classic", on the other hand, has a more traditional look with a chrome steel exterior and is available in fewer colours.

## Price
- The "Design Atlas 150" is usually more expensive than the "Atlas 150 Classic" due to the different colour options and the aluminium exterior material. The price for the "Design Atlas 150" is around 89.99 USD, while the "Atlas 150 Classic" costs around 69.99 USD.

## Functions and components
- Both models offer the same basic functions, including the ability to make lasagne, fettuccine and tagliolini, and are compatible with the Pastadrive motor and various pasta cutting accessories. There are no significant differences in the included components or mode of operation between the two models.

Overall, the differences are mainly cosmetic and concern the design and colour options, while the functionality and quality of the machines remain similar.