The real advantage Hella E-codes have over the ellipsoids is that it keeps quite strong light even when a lot of dirt stays on the glass....
The elipsoids needs to be kept clean all the time, because the light is focused in the center of the glass and the dirt makes them loose light very fast. It is enough to clean just the 3cm radius in the center of the glass to get the 100% light back on the road :-) Elipsoids are especially iritating in the winter while driving in the back of the other cars on the wet/salty surface.
Also differ bosch elipsoids from hella's... Bosch makes mirrors on the iron surface while hella produces plastic ones. The first stays stable even equipped with H1/100W and the second melts down because of the temperature, and it can break this fantastic light transfer down...