A 160 GB disk is not a real comparison for enterprises. XFS really starts to perform better on disks 1Tb as well as 8 cores and above. EXT4 really starts to creak when moving to filesystems that are 16TB and above. Something that is going to be common in the 7 years that Cent-OS 7 is around.
Of course with the amount of backports of patches that any RedHat kernel has the comparison to mainline version numbers is almost useless :(
For my workload the performance difference is 15% better for XFS than EXT4 on the same 3Tb of SSD with the same workload.
RHEL pretty much is the standard for enterprise-y distros. I'm pretty confident they weighed the XFS decision very heavily, and in the end chose it for good reason.
In fact, here's an article on the SUSE blog from a year ago discussing why XFS is a great choice for enterprise:
Of course with the amount of backports of patches that any RedHat kernel has the comparison to mainline version numbers is almost useless :(
For my workload the performance difference is 15% better for XFS than EXT4 on the same 3Tb of SSD with the same workload.