In what way were the Persians who landed at Marathon militarily superior to the Greeks?

In what way were the Persians who landed at Marathon militarily superior to the Greeks? Why, despite this superiority, did the Greeks win?

They outnumbered the Greeks in numbers and weapons. True, then the Persian troops were tired because of the crossing, moreover, some of the troops were still on the ships, and some of the troops landed and were not formed into battle formations. Thus, the Greeks used a very fortunate time. They struck a swift blow and defeated the Persians, then the remnants of the enemy troops fled to the ships. So Greece was able to get the first major victory.