It will be better to disclose than to try to come back later to try to explain why you think Texas should consider a DUI as a moving violation. Then you can do it on your terms. Especially since you have not been convicted (and ultimately may not).
Is a DUI in California punishable by jail time, or is it only punishable by a fine? A Class C misdemeanor in Texas is punishable by a fine only; my interpretation of this would be that a crime in another state that is punishable by a fine only would be considered the same as a Class C misdemeanor.
Still, this is difficult because a DWI in Texas IS punishable by jail time, and if you don't disclose it you run the risk of the licensing agency finding out about it anyway and treating it the same as a Texas DWI, meaning you'd be lying about it.
Your DUI in California is considered the equivalent to a class (b) misd in Texas. If it wasn't reduced to a wet reckless it's the same a a DWI in Texas.