Anyone calling the KO from the first fight 'lucky' is an absolute troll. Lucky would be a guy who has never KO'd someone; KOing a guy who has never been rocked.
The quick KO is every bit of JDS' style as a grinding, high paced fight is Cains. Which style you are personally more impressed with is really illrelevent. Its 1-1 now with both fighters earning convincing wins.