UTF-32, as the name implies, encodes each character in 32 bits.
Therefore is overkill for just about any western European content.
UTF-16 as the name implies, encodes each character in 16 bits.
Smaller and can handle Western culture-- but not appropriate in this global era...
So it stands to reason to guess that UTF-8 would encode a character in 8 bits, and that UTF-32 would be better for encoding Unicode in a globalized world.
It would be a wrong guess. Here's why...