Percona MySQL Vs Oracle MySQL

Percona MySQL:
1> It provides extra diagnostic features like:
   * Undo Segment Information
   * Per-table/Index/Client/Thread Performance Counters
2> It provides tokuDB supports
3> It provides threadpool with community version
4> It provides extra feautres for DBA/OP staff:
   * Configurable page sizes
   * Backup locks
   * Ability to Kill Idle Transactions
5> It provides XtraDB storage engine.

Oracle MySQL:
1> It provides support of NoSQL interface via memcached

Note: Oracle MySQL Enterprise edition do provides lot of extra features like Security, Encryption, Auditing, Scalability, Monitoring.

Reference:
https://www.percona.com/software/mysql-database/percona-server/feature-comparison
http://www.sobstel.org/blog/mysql-like-databases-comparison/