[kuschku]

Yes, completely different families.

EA189 was a Pumpe-Düse system able to get up to 280mpg in production vehicles, at the cost of high NOx emissions.

EA288 is a standard common-rail engine with AdBlue.

[arcticbull]

The 189 may be either Pumpe-Düse or Direct Injection. AFAIK all the post-2009 models implicated are common-rail direct injection.