Complex sentence: The first seems like a military parade and is performed in collaboration with Moscow government and Irish embassy in Moscow, and the second is made by volunteers and seems like a carnival and show with juggling, stilts, jolly-jumpers and Celtic music.
Split into simpler sentences: The first seems like a military parade and is performed in collaboration with the Moscow government and the Irish embassy in Moscow. The "unofficial" parade is performed by volunteers and seems more like a carnival and show with juggling, stilts, jolly-jumpers and Celtic music.