Great lineup for a split EP, each band from a place where surf just won't quit. Los Galerna take the first half of the split at a fast pace. Their sound is pretty standout mix of distinct percussion, quick-pickin' guitar and honkin' sax. It's got great punch and really comes together! I'm a little more familiar with Mexico's The Cavernarios, and they definitely hold up their end. They start with a blistering fuzzy number, then move to a pretty one, and end with a sunny twister.
Whole thing is pay-what-you-want on bandcamp, absolutely worth a listen!