Answer:
The best by the concept of the newest is the better is the openssh-server-6.6p1-1.el6.x86_64.
Step-by-step explanation:
The openssh-server-5.3p1-118.1.el6_8.x86_64 and the openssh-server-6.6p1-1.el6.x86_64 are named version of a server which is the openssh- server.
The first server is the later version is the 5.3p1 version( which is seen after the server name ), while the former is the 6.6p1 version. They both use the Linux operating systems version RHEL 6 and 6.8 and are for 32-bit and 64-bit computers (.x86_64).
So, judging by the newest, the version 6.6 is the better server of the two.