Can't speak to TX but here in CA the Vagos and Mongol gangs are Hispanic and have a long and notorious rivalry with the Hell's Angels who are white. If memory serves the Vagos MC started when they were refused entry into the Hell's Angels because they were Mexican.
In Billy Queen’s book, he said the Mongols were about two-thirds white and the leadership was about 50-50 white and Hispanic.
The events he wrote about happened about 17 years ago, so a lot could have changed since then. But I asked a local cop about this not too long ago, he said those numbers still sound accurate nationally. He said the California chapters have been heavily recruiting from the street gangs there and have pushed the numbers of Hispanics up in the chapters there.