Compares the current vector clock with the supplied vector clock. The outcome will be one of the following:

1. Clock 1 is SAME(==) as Clock 2 iff for all i c1(i) == c2(i)
2. Clock 1 is BEFORE(<) Clock 2 iff for all i c1(i) <= c2(i) and there exist a j such that c1(j) < c2(j)
3. Clock 1 is AFTER(>) Clock 2 iff for all i c1(i) >= c2(i) and there exist a j such that c1(j) > c2(j).
4. Clock 1 is CONCURRENT(<>) to Clock 2 otherwise.