MySQL 5.1.49 and MariaDB 5.1.47 InnoDB/XtraDB plugin
From Askmonty.org
MariaDB 5.1.47 with XtraDB as a plugin is around 3% slower running sysbench v0.4.12 tests than MySQL 5.1.49 with InnoDB plugin. This is highly due to an older version of the plugin used by MariaDB (1.0.10 compared to 1.0.6-10).

