This is the final report:
I took the only fruit so far that gave the tree at my parents' house, he said the smell was like a peach, but my mother said that it reminded her of popcorn (agree with both), and my wife commented that reminds a yogurt (also agree). Then, the aroma is like a cross between caramel, peach, yogurt, popcorn ...
When I returned home, I cut it in two: It came out much juice! That was nice. The taste was well balanced between acidity and sweetness, now I know that I should not have the "acid" variety, then it must be the sweet type.
The pulp was not firm -perhaps it was overripe-, being juicy and with some fibers that do not bother.
The taste reminded me of a tangerine. The red pitanga (eugenia uniflora) also reminds me mandarins (though. when underripe it has that annoying resinous flavor), and since both are eugenias, I should not be so wrong. The flavour of our e. uniflora is stronger than this e. pyriformis.
Maybe a little bland: I expected more acid and sweeter, but I can not blame anything to this fruit and I would it many of them per day: it has the quality of fruits sold in any grocery store (and the sweetness of a guava). Keep in mind this is the first fruit of the tree (the next should be better), and that in 2 or 3 months there will be 3 more to try.