How did the two Ethiopian coffees differ from one another?
When I compare and contrast two coffees from a single country (or region within a country) I will attempt to test for another variable (washed, or naturally dried, for example).
Personally, - and this is very much a matter of subjective personal taste - I find that while I like (and, at times, love,) all Ethiopian coffees, I really like their "naturally dried" coffees.
These were both naturally dried. One was from the Guji region and had an initial brief strong earthy flavor that then went a bit sweeter fairly quickly. The other was labeled as Sindamo and was smoother, creamy perhaps. The flavors for both changed noticeable as they cooled going towards what the packaging suggests as "cherry" for one and "current" for the other.....fruit-like flavors in any event