well,its right that corolla has less damage.but that doesnt mean its safer then a merc.mercs hav energy absorbing frame,which absorbes very much of the impact energy but lets very small portion of it to the passengers.so it destroyes its self but keeps the passengers safe by keeping the G force level low...
and nice thing to see that rollas air bag worked nd it means the driver was wearing seatbelt(Y)
@umar
the headunit didnt went it,it was either stolen by sumone or was taken out by the owner of the car bcyz he wud hav known that if he left it there,it wud b gone in minutes
my friends city had an accident on a highway late night,he left the car un attended for 4-5hrs,the tape,stuppny,2 tyres(which were held in air due to roll over)the cigrette lighter,engine air box nd many more small things were disappeared.