The flow might be different. I would say use aftermarket something with a computer inside.
but any ECU that can drive low-Z can drive hi-Z but not the other way around.
so it will not fry a l-junk driving a hi-z motronic. but the l-jet is a very crappy system.
just about as bad as it gets. it is super simple so it is kinda reliable but over all it it junk.
moving back from a motronic to a l-junk is a big step backwards.
there are so many aftermarket ECU's to use now I would say get one with a good rep. or at lest one you local tuner likes..