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

Yes

The word "modernos" is identical in meaning, grammar, and spelling in both Brazilian and Continental Portuguese. The only difference lies in pronunciation. In Continental Portuguese, speakers frequently use vowel reduction, meaning unstressed vowels are shortened or almost swallowed. In Brazilian Portuguese, vowels are typically more open, clear, and fully articulated.

Brazilian Portuguese Examples

1. Os móveis modernos deixaram a sala muito bonita. (The modern furniture made the living room very beautiful.)
2. Adoro esses gadgets super modernos. (I love these super modern gadgets.)
3. Os prédios modernos da cidade são impressionantes. (The modern buildings in the city are impressive.)
4. Eles têm gostos muito modernos de música. (They have very modern tastes in music.)
5. Os métodos modernos de ensino são muito eficazes. (Modern teaching methods are very effective.)

Continental Portuguese Examples

1. Os móveis modernos deixaram a sala muito bonita. (The modern furniture made the living room very beautiful.)
2. Adoro estes aparelhos super modernos. (I love these super modern devices.)
3. Os edifícios modernos da cidade são impressionantes. (The modern buildings in the city are impressive.)
4. Eles têm gostos muito modernos de música. (They have very modern tastes in music.)
5. Os métodos modernos de ensino são bastante eficazes. (Modern teaching methods are quite effective.)