graphic: 0.775
performance: 0.657
other: 0.559
semantic: 0.551
device: 0.442
permissions: 0.371
files: 0.217
network: 0.196
socket: 0.147
PID: 0.134
debug: 0.105
boot: 0.101
vnc: 0.096
KVM: 0.026

qemu-img compare -m option is missing