Refe could be described as a bold condensed featuring a 1:1 relationship between positive (stroke) and negative space, tall ascenders, short descenders, rounded countershapes and squared off corners! Diacritics support spanish, hello again from Argentina! :)
Grulla's letters –built on a 2x3 square grid– have (tri)angular counters & square terminals. Counterspace=letterspace, letter /f/ is kerned onto "rounded" letters (fc,fd,fe,fo,fs). Diacritics support spanish (hello from Argentina!)