The music is from Spain, and Mexicali is the city south of the border in that region.
The similarity is that the music sounds like something Calexico would have put out and something that wouldn't feel out of place on Carried to Dust. The primary difference is that the lyrics are primarily in Spanish, but if you put the songs alongside any of the Spanish language tracks on a Calexico album, you'd think they are from the same album. I suppose that should be expected... I discovered this album because Calexico produced it, and I wanted to find something similar but different from these guys.
This album may be too similar to a Calexico album, that if you are looking for a deviation from the Calexico sound, you won't find it. Then again, if you like Calexico and think a lot of Spanish lyrics are pleasant, this will be a great album. The only challenge may be if you want to understand the lyrics, and you don't speak Spanish. I really don't speak the language, but I know it well enough to get the idea of each song. It is beautiful music, and generally Spanish is a beautiful language (it is a romance language). Besides the language, the album sounds all Calexico. They perform as the band on most of the tracks and even sing on two of them. The similarities are not subtle like they have been on Calexico's other side projects (Iron and Wine, Neko Case, Amos Lee).
So, while it may sound like I am being critical of the album, it really isn't bad at all. I love the Spanish lyrics. I struggle to find music to accompany my Calexico albums with a similar sound and style but different vocals (English or Spanish). It is difficult to find such things, and this is one that fits the bill better than almost anything I've ever found. And, while the artist is from Spain, don't expect true Spanish style music. It is all Americana and perhaps Mexican in sound and style.