The MG Midget and Austin Healy Sprite were basically the same thing, a small Sports car using the small BMC "A" series engine design, from the 850cc Mini to the 1300cc series car.
The Austin Healy 3000 was a different kettle of fish, it used the BMC "C" engine, which was fitted to big saloons, the MGC and others, but at different states of tuning...☺️