centos7とcentos6.5の違いは何ですか

[CentOS6] GNOME 2.x
[CentOS7] GNOME 3.x（GNOME Shell）

[CentOS6] ext4
[CentOS7] xfs

[CentOS6] 2.6.x-x
[CentOS7] 3.10.x-x

[CentOS6] GRUB Legacy (+efibootmgr)
[CentOS7] GRUB2

[CentOS6] iptables
[CentOS7] firewalld

[CentOS6] MySQL
[CentOS7] MariaDB

[CentOS6] /bin, /sbin, /lib, and /lib64在/下 
[CentOS7] /bin, /sbin, /lib, and /lib64移到/usr下

[CentOS6] /etc/sysconfig/network/
[CentOS7] /etc/hostname

[CentOS6]$ ntp $ ntpq -p /
[CentOS7] $ chrony $ chronyc sources

[CentOS6]
$ vim /etc/sysconfig/clock
ZONE="Asia/Tokyo"
UTC=fales
$ sudo ln -s /usr/share/zoneinfo/Asia/Tokyo /etc/localtime
[CentOS7]
$ timedatectl set-timezone Asia/Tokyo
$ timedatectl status

[CentOS6]
$ vim /etc/sysconfig/i18n
LANG="ja_JP.utf8"
$ /etc/sysconfig/i18n
$ locale
[CentOS7]
$ localectl set-locale.utf8
$ localectl status