It's Pro. Options are just limitless. We tried to build Persona Pro as much customizable as possible for our users to create more unique looks.
The Lightbox 2.0 plugin is built in Persona Pro. You can not only view your images in a gallery view, but also move through your photos, and share these.
Persona Pro comes with a diverse range of 30+ layout options. Add paddings, choose columns, or adjust pixels. It's simply limitless.
Tumblr is not limited to one page. You can create a whole new page, using the same layout of Persona Pro. Create a contact form, about, or any custom page.
Tumblr's amazing font list provides basic fonts for every use. What fonts do your themes support?