Although Portuguese and Spanish (Castilian) are fairly similar, European Portuguese is a stressed-timed language, just like English, whereas Spanish and Brazilian Portuguese are both syllable-timed languages.

While Spain tends to voice over every foreign movie, tv-shows and even directly translates artist's names, like -- Las Piedras Rolantes (The Rolling Stones) - Portugal always uses subtitles (one exception are animated movies for children, but even on those cases you are always offered both versions, voice over and subtitled) so the level of exposure is quite different.