[sv-ec] Query on get_coverage()

Please note the following excerpt from P1800-2009, draft6:
 
"The get_coverage() method returns the cumulative (or type) coverage,
which considers the contribution
of all instances of a particular coverage item; and it is a static
method that is available on both types (via the
:: operator) and instances (using the . operator). In contrast, the
get_inst_coverage() method returns
the coverage of the specific instance on which it is invoked; thus, it
can only be invoked via the . operator."
 
The above para mentions that get_coverage() can be used with covergroup
instance also. So, in the following
example, would both get_coverage() and get_inst_coverage() report same
numbers? If they are same, what
is the justification of allowing get_coverage() for instances?
 
cg cgi = new;
cgi.get_coverage();
cgi.get_inst_coverage();
 
Thx,
Swapnajit

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