No. It is not newer than 29.1. This 29.5 is actually a customised 29.1 version. I think it has the Spanish language files copied onto some other, or all other, language files to fool the system into speaking Spanish without the need to recode for Spanish language. It is either that or something similar to the same effect. It may also have a custom splash screen.
You do not want to upgrade to this 29.5 if you do not want your system to speak Spanish, or you have, or plan to have, your system properly recoded.