Bilingualism: The ability to speak proficiently in two languages
Biliteracy: The ability to read and write proficiently in two languages
Someone who is bilingual is not necessarily biliterate.
Someone who is biliterate is typically also bilingual.
Which one is better?
It depends on your goals!
If you want to use Spanish in academia, business, or in your profession, BILITERACY is better!
If you want to travel, make friends, speak to family, then BILINGUALISM is probably enough!
In the majority of high school Spanish classes and online Spanish programs, BILINGUALISM is the only goal.
Rae Spanish courses focus on helping students reach both BILINGUALISM and BILITERACY!
You can try Week 1 of Spanish 1 for free on learn.raespanish.school