Linkage Monitor to have an option to show the debug output

When I have to troubleshoot Linkage Monitor, I'll have to compare the content of baseline BOM and snapshot BOM. Is there any good way to see the difference quickly?

```
for (int i = 0; i < baselineCoordinates.size(); ++i) {
String elementB = baselineCoordinates.get(i);
String elementS = snapshotCoordinates.get(i);
if (elementB.equals(elementS)) {
continue;
}
System.out.println("baseline: " + elementB + ", snapshot:" + elementS);
}
```

What if some elements are only in baseline or snapshot? What's the best way to compare 2 list of Maven coordinates?