Glazunov sounds more energetic, sweeping, post-romantic.

Glinka sounds more simple, repetitive, closer to classical.

Only Glinka has vocal. (Glazunov, Glinka)

Although both composers are characterised as simple folklore melodic, Borodin is often more complex, post-romantic, even dissonant. Watch out for Borodin Dance of the Polovtsian maidens and Symphony 2, which are very dance energetic.

Glinka is more dance, simple melodic. Watch out for Jota Aragonesa, which is dark and slow.

In this game Glinka has only one vocal piece: Prayer (slow male solo vocal and choir).

Only Borodin has string quartet, piano song in this game. (Borodin, Glinka)

Language is not the main thing to listen to on this island. In this game Offenbach is performed sometimes in Russian language. Pay attention to music more. Offenbach - only operetta, comic and sometimes bravura. Glinka - dance, opera. Glinka is also very energetic, but usually not that comic. (Glinka, Offenbach)