Every meteorite fall on earth mapped

Or at least those we know about. And where are the known meteorite landing places on earth? These impact zones show where scientists have found meteorites, or the impact craters of meteorites, some dating back as far as the year 2,300BC. The data is from the Meteorological Society and doesn't show those places where meteorites may have fallen but not been discovered

http://www.guardian.co.uk/news/datablog/interactive/2013/feb/15/meteorite-fall-map

What's the difference between all those 'space rocks'?