Yes, in general the higher mills = more durability. As you have a thicker top surface to protect against indentation or scratches.

Here's a white oak laminate that you may like. I've recommended this product as an installer for clients who were initially looking for vinyl. The reasons why I like to recommend it to my customers: 100% waterproof (submersible for 24 hrs) and has the highest durability rating possible (AC6 - which means it is recommended for heavy commercial applications). The high durability and moisture resistance lends itself favorably to be a recommended "pet proof" product.

On the other hand, SPCs are also a great alternative to vinyl planks as they are more rigid in nature and tend to be more durable (most of them you will notice will advertise "petproof" as a selling point).