Alby also has an integrated auto populating tool within Amethyst. I'm very noob, and having the necessary fields auto populate was a relief for me. I'm not sure where I would find the necessary info otherwise. 🤔 

So, being able to zap others without needing to interact with my wallet outside the Amethyst client, and having the fields for setup auto populate are the main benefits (for me) of using alby.