I believe the main purpose of this driver is for 295X2 support, which is why it seems so similar to the previous beta and the component versions are practically the same. This has happened before (where even the file versions are the same) but the file size is different due to minor build differences due to the addition of the support in the unofficial release. In other words, it's practically a modified 14.3 beta 1.0 rather than specifically a 14.4 beta (the 14.4 beta label was probably given because it's now April!). Hopefully soon we will see a 14.5 beta which should be more substantial. This release wasn't 14.5 beta because 14.5 probably isn't quite ready even for beta status, and they needed a relatively stable (but very recent) base for the 295X2 review drivers.