Thanks for your stats. I'll try to bring some history and the latest events behind them and let the community evaluate them.
These stats seem to be confirming MRA that absorbed low-performing alliances with the sole purpose to eat their players while benefiting their temples and promising their leaders final roster.
BK leaders/founders pushed players to mass spam PE threatening them to be booted and eaten instantly if they don't post reports. They even promised 30k rss reward for the best spammer. Imagine 120-170 players spamming 2 or three 24/7. And imagine ruining people's lives for 30k in virtual rss.
As an outcome, BK got 40+ PE cities over 2 days with mass-timing into players' VM while their vassal alliances got nothing but more threats to be eaten and such.
Here comes the stats back again. Active players vs active players: MRA is still way behind, and BK alone is still slightly behind.
But guess what! Every time BK player is losing siege against PE/Beuties they move them to UC to keep BK stats looking better. Can be checked on grepolife as well.