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

Yes

The only significant difference between the two variants is pronunciation. In Brazilian Portuguese, the "e" in "queridos" is typically pronounced as an open vowel (/ɛ/), sounding similar to the "e" in the English word "met." In Continental Portuguese, the "e" is often unstressed and reduced to a near-silent, closed vowel (/ɨ/), making it sound much more muffled or neutral.

Brazilian Portuguese Examples

1. Oi, meus queridos! Como vocês estão? (Hi, my dears! How are you?)
2. Eles são muito queridos por todo mundo aqui. (They are very loved by everyone here.)
3. Meus queridos amigos chegaram para a festa. (My dear friends arrived for the party.)
4. Dê um beijo nos seus queridos. (Give a kiss to your loved ones.)
5. Queridos, prestem atenção na aula. (Dears, pay attention to the class.)

Continental Portuguese Examples

1. Olá, meus queridos, como estão? (Hello, my dears, how are you?)
2. Eles são muito queridos por toda a gente. (They are very loved by everyone.)
3. Os meus queridos amigos chegaram para a festa. (My dear friends arrived for the party.)
4. Dá um beijo nos teus queridos. (Give a kiss to your loved ones.)
5. Queridos, prestem atenção à aula. (Dears, pay attention to the class.)