Both fragmental breccias and regolith breccias have fragmented and broken textures. But the absence of trapped solar wind in meteorites like Cumberland Falls indicates that they are deeply buried fragmental breccias.
The black melt pockets in EET A79001 hold gas trapped during impact melting. The composition of this gas is identical to the martian atmosphere, providing the first evidence that EET A79001 came from Mars.
Diogenites are chemically related to eucrites and probably came from Vesta, too. They formed underground when pyroxene crystals solidified and sank in magma. Impacts excavated and broke up layers of the crystals, ultimately blasting these fragments into space.
The volcanic eucrites formed only 20-50 million years after the Solar System did--which means that some asteroids grew large enough to melt very early in Solar System history. Later impacts produced the broken texture seen in Juvinas.
Nakhla formed on Mars when dense pyroxene (greenish-gray) and olivine (brown) crystals settled out of molten rock. It contains water-bearing minerals, supporting the idea that the Martian valleys once carried water.
We know Shergotty came from Mars because it contains gas whose composition matches that of Mars's atmosphere as measured by the U.S. Viking spacecraft. An impact trapped the gas in the rock and flung it into space.