I see overlap between these approaches, but not sure I'd go so far as considering one or another "better" for all use cases. Tails specifically targets "less sophisticated" users, and is pretty self-explanatory. And true to its name (and unlike Qubes and Whonix), Tails goes to pains to be "amnesiac" by design, although you can of course subvert that by enabling persistence. It's hard to hold a candle to Tails when using computers at local libraries or internet cafes, or when you really need to maintain a minimimal data footprint when traveling internationally.