

You’re asking how two of the same thing are similar? Very strange. They share the same definition. They are similar in the ways that things with that label are similar.
Genocide: the deliberate killing of a large number of people from a particular nation or ethnic group with the aim of destroying that nation or group.
All of that is similar.
Happening in different times, to different groups, in a different region… there are millions of differences down to being named Siwar Jamassi instead of Anne Frank.