A huge percentage of the Spanish language listening comes from the HDHA residents. The Univision signals did not do as well in them as the Z signal did.107.7 is a bad rimshot for sure and the current format is not ideal for the Williamson County population it reaches best, but 104.3 isn't too bad.
It's roughly equivalent to La Z's 107.1. 107.1 is a little better overall, but they are both C2 eastern rimshots from outside Travis County that have some deficiencies. 104.3 has some issues in western Travis and Hays and 107.1 has some problems in Williamson.
They both are more than decent in the heavily-hispanic areas east of I-35 though. I think La Z has "won" mostly because of the superior programming and better community involvement/engagement.
And Z had a PD I trained who came out of the very successful San Diego UVN Regional Mexican station; he was also an excellent morning guy.