What does "ioping" mean? similar to "dd"?

what is the different between ioping and dd test?

I did an ioping and dd test on my vps, but don't know how to interpret the result. which numbers should I pay special attention to?

what is the benchmark for "excellent", "good", "OK" and "bad" for a vps?

ioping -c 10 /
4096 bytes from / (simfs /dev/simfs): request=1 time=336.8 ms
4096 bytes from / (simfs /dev/simfs): request=2 time=134.5 ms
4096 bytes from / (simfs /dev/simfs): request=3 time=1784.0 ms
4096 bytes from / (simfs /dev/simfs): request=4 time=397.6 ms
4096 bytes from / (simfs /dev/simfs): request=5 time=306.2 ms
4096 bytes from / (simfs /dev/simfs): request=6 time=86.9 ms
4096 bytes from / (simfs /dev/simfs): request=7 time=330.8 ms
4096 bytes from / (simfs /dev/simfs): request=8 time=248.0 ms
4096 bytes from / (simfs /dev/simfs): request=9 time=527.3 ms
4096 bytes from / (simfs /dev/simfs): request=10 time=273.1 ms
--- / (simfs /dev/simfs) ioping statistics ---
10 requests completed in 13431.3 ms, 2 iops, 0.0 mb/s
min/avg/max/mdev = 86.9/442.5/1784.0/462.5 ms

ioping -RL /
--- / (simfs /dev/simfs) ioping statistics ---
1 requests completed in 6149.2 ms, 0 iops, 0.0 mb/s
min/avg/max/mdev = 6149.1/6149.1/6149.1/0.0 ms

dd if=/dev/zero of=test bs=64k count=16k conv=fdatasync
16384+0 records in
16384+0 records out
1073741824 bytes (1.1 GB) copied, 36.1959 s, 29.7 MB/s