Is the word músicas the same in Brazilian and European Portuguese?

No

While the spelling and grammar are identical, there are differences in typical usage and pronunciation:

• Typical Usage: In Brazil, "músicas" is the standard word for both the art form of music and for individual songs/tracks. In Portugal, while "músicas" is used, speakers more naturally use the word "canções" when referring to specific songs or tracks, often reserving "música" for the concept of music in general.
• Pronunciation: Brazilian Portuguese features more open vowels and a sibilant [s] (like the "s" in "sun"). Continental Portuguese uses more closed or "reduced" vowels and a [ʃ] sound (like the "sh" in "sugar") for the final "s."

Brazilian Portuguese Examples

1. Eu amo essas músicas. (I love these songs.)
2. Essas músicas são muito animadas. (These songs are very upbeat.)

• Você gosta de músicas antigas? (Do you like old songs?)

4. Eu baixei várias músicas novas no meu celular. (I downloaded several new songs on my cell phone.)
5. As músicas deste álbum são ótimas. (The songs on this album are great.)

Continental Portuguese Examples

1. Eu adoro estas canções. (I love these songs.)
2. Estas canções são muito animadas. (These songs are very upbeat.)
3. Gostas de canções antigas? (Do you like old songs?)
4. Eu descarreguei várias canções novas no meu telemóvel. (I downloaded several new songs on my mobile phone.)
5. As canções deste álbum são ótimas. (The songs on this album are great.)