I don't think there's a comparison, especially if we are talking about the run-of-the-mill BSU's across this country. Take this one for instance, Googles example when searching "Black Student Union."
https://rockchalkcentral.ku.edu/organization/BSU
What sticks out to you when you see their banned?
or when you click on their profile link:
Here's the vision statement from the NBSU:
Again, are these black unions functioning at the consequence of others races? The black community suffers from fatherless families, an incarceration rate far higher than for every other race and a host of other problems. Black unions seem to me to add a sense of discipline and goal oriented thinking which is usually wholly needed in many communities regardless of race.
All I am saying is that this trend towards race specific groups is a bad idea. We need more inclusion and exposure on an intimate level. Not self segregation. So on that level they are comparable.