Arial is a neo-grotesque sans-serif with abrupt terminals. Sansa Pro Normal is humanist with softer, flared strokes. Sansa Pro is significantly more readable for long documents.
If you need "Sansa Pro Normal" for a website (CSS), do not download a desktop TTF. You need a webfont license. download font sansa pro normal
It is also listed on retail sites such as Fontshop . Licensing and Usage Commercial Use: Requires a paid license from the foundry. Arial is a neo-grotesque sans-serif with abrupt terminals