The rates are the same ($1 per million writes and $0.70 per million reads beyond the daily free threshold), but the daily free threshold is 0.05 million of each

The rates are the same ($1 per million writes and $0.70 per million reads beyond the daily free threshold), but the daily free threshold is 0.05 million of each for master/slave, and 0.01 million of each for high-replication.