I have sung Russian literature in my avocation as a chorister. I have also sung it in Eastern European cathedrals (but not in Russian ones).
Russian masters wrote slow pieces because their cathedrals had a long, live echo: wash of sound. (Phil Spector would have liked.)
I am a very low bass. Many choirs cannot adequately render such pieces without at least one bass like me. I was privileged to sing for a world-famous conductor in 2004-05. With me and one other low bass in the choir, she added Russian pieces she had not used for seven seasons.
Russian Oktavists often show up just to sing notes in the first octave (usually, G1 to B1).
I am not that good, but I get by. Although I can sing an Ab1, the lowest I have officially performed is a B1 in Duh tvoy blagii, by Chesnokov. I was pleasantly surprised that audiences in Germany, Austria, Slovakia, and Italy could all hear me, since I was alone on those notes, out of 33 quasi-professional singers. I knew that because people came up to me afterward and told me so.
My favorite Russian piece is Bogoroditse Devo (Hail Mary), by Rachmaninov, both to sing and to hear. It is gorgeous.
I will check these out when I can listen.
Also known as "Rejoice, O Virgin" from the Vespers?
If so, I sing that with my Antiochian parish choir quite reqularly, especially during Great Lent before the Feast of the Annunciation and during the Dormition Fast.
We also sing "Come Bless the Lord" and "Praise the Lord from the heavens" by Rimsky-Korsakov almost every week.