I'm no expert but here's my thoughts.
Advantages.
1. You can't use abrasive on aluminium. The carbide saw is ideal.
2. When cutting steel the chips carry away most of the heat which can be a definite advantage if you don't want heat marking of product.
Disadvantages.
1. I think you can cut much faster with the abrasive.
2. Think you could over heat the carbide to the point where the teeth fall off.
Paul