What i understand about each of them is that. The first brother gambling store operates typically by luck and a gambler is gambling online so you don't know who to blame when you lose your money. But the other brother has a store that you gamble with other gamblers. It's a one-on-one gambling environment where you just don't rely on luck to win but you have to be skillful in it. This is why there must be a winner and a loss in gambling but there are more physically losers in the second gambling environment.
Most persons prefer losing money online since they cannot go and meet anyone for refund. But whenever they lose money physically, they will always know who to meet and create a scene or fight. This is part of human nature.