How these tools differ from each other
Every page runs the same styling engine, so a style you liked on one is available on the rest. What changes is the order and the guidance.
Each tool leads with a themed set built for its topic. The Adopt Me page opens on paws, bows, and soft hearts, a shooter page opens on skulls and blades, and a professional page opens on plain brackets and rules. The shared catalogue follows underneath on every page.
The writing differs more than the styles do. A page for a specific platform tells you the character limit, which field accepts styled text, and which one will refuse it, and that is usually what decides whether your text saves.
Picking the right page
Start from where the text is going rather than from the style you want, since the limits are what usually decide the outcome.
If a field rejects your styled text, try the same words inside a symbol frame instead. Frames leave the letters alone, which is why they pass filters that refuse converted alphabets.