[1]openEuler iso contains Desktop Environment(gnome,kde or others) redhat desktop environment is gnome,but centos 8.1 don't contain gnome package
[2]openEuler iso contains Customed Destop Environment(ukui,mate or others)
[3]openEuler iso doesn't contain desktop,Desktop Environment release in EPOL repo(gnome,kde,ukui,mate or others)
I recommend solution 2