Student or Learner
A We can vote when we're 20 years old.
B We get the right to vote when we're 20 years old.
Are A and B the same in meaning?
It seems to me that A means we have the right to vote only while we are twenty.
It is a matter of style.
to have the right to do sth. is quite formal
to get the right to do sth. - means that up from this age you have the right to do sth.
can - you can as well swimm, read, write...
still, it means that at the age of 20 you have the right to vote