MySQL or MariaDB

Hi,

I work with CWP...

When come into CWP,  I see:

1)Application Version
...........................
...........................
MySQL version: 5.1.73
..........................
Here, in forum I saw:

2)Application Version
...............
...............
MySQL version: 5.5.52 -MariaDB
...............
MySQL or MariaDB, 1 ор 2 that is the question?!?

Thanks in advance!

BR
Venty

Pls, help...