Refreshed internals, lower price point possible.
Apple Seeds Second Beta of iOS 9.3.3 to Developers
The second iOS 9.3.3 beta can be downloaded from the Apple Developer Center or over-the-air with the proper configuration profile installed.
As a minor 9.x.x update, iOS 9.3.3 appears to focus on under-the-hood bug fixes and performance improvements to address issues discovered since the release of iOS 9.3.2. No outward-facing changes or obvious bug fixes were found in the first beta of iOS 9.3.3.
There was originally no iOS 9.3.3 update released for the 9.7-inch iPad Pro because Apple needed to fix an iOS 9.3.2 bug that bricked some devices, but it was addressed in a new iOS 9.3.2 update last week. iOS 9.3.3 is now available for the 9.7-inch iPad Pro.
We'll update this post with any changes that are found in the second iOS 9.3.3 beta.