Categorize products in two types of categories

[nearwen]

I would like to know what's the easiest way so I can add one more type of categories.

Taking motorcycles as example: So the user can get to an specific product through "Brand and model" of his motorcycle, but also through "motorcycle accessory".

 

Both categories need subcategories. And also some products need to be findable for this two types of categories.

 

I know is possible with only one block of categories, but I want to distinguish this visually, noticing the difference between eachtoher.

 

It'll be great if I can use the 'brand and model' section as a dropdown menu at the sidebar, and the accesory section by the ordinary option.

 

I found this example:

 

I'm just beginning with Prestashop, and I don't know much about coding.

 

Thanks in advance