[RupertSalt]

What does "easy" and "hard" mean? Approaching the range? Matching the pitch? Sustaining it for a time?

There are not many tasks that can be cut-and-dried as universally "easy"/"hard". "The Star Spangled Banner" is a more challenging melody because of its wide range. Also, because it's often sung solo, with minimal accompaniment, to huge crowds.

If I were singing falsetto notes, I could probably launch into the range, but could I match pitch and harmonize without AutoTune?

[rjh29]

The Take On Me chorus has a two octave range in full voice (A2 to A4) and a falsetto at E5. I think it's harder to find people who can sing that chorus A2-A4 consistently than to find people who can squeak out a falsetto at E5. Yet the falsetto is more "impressive".

I guess I could be biased because I find it easy and not everyone finds reinforced falsetto easy. But for example Bohemian's Rhapsody famous falsetto high note is Bb5, a full half-octave higher.