The results prove that they are equal.

Code:
use_explicit_cursor returned TRUE!!!
use_explicit_cursor Time (seconds) 0
use_select_into returned TRUE!!!
use_select_into_1 Time (seconds) 0
use_select_into returned TRUE!!!
use_select_into_2 Time (seconds) 0

PL/SQL procedure successfully completed.

Elapsed: 00:00:00.00