Implicit method group conversion gotcha

I am wondering why the output of the given code (execute it in LinqPad)

void Main() {
    Compare1((Action)Main).Dump();
    Compare2(Main).Dump();
}

bool Compare1(Delegate x) {
    return x == (Action)Main;
}

bool Compare2(Action x) {
    return x == Main;
}

is always:

 False
 True

I have naively expected it to be True in both cases.