Again, it doesn't matter. If you are not experiencing any issues or if there are no new features you need, forget about updating drivers.
But to answer your question - there might very well be drivers on the HP site that are NEWER. When you try to update drivers via Device Manger, Windows only looks for WHQL drivers. Those are drivers certified by Microsoft as being compatible with most hardware. It is not unusual for Microsoft to bastardize drivers provided to them by the OEM for certification in order to make them widely compatible. In doing so, they may disable certain new features introduced by the OEM even though those features are why the driver was released in the first place. Personally, I've never worried about certification. And if your system is an HP computer you can certainly feel comfortable downloading drivers from the HP website INSTEAD of through device manager.
But again - the best advice I can offer the typical user is to NOT update drivers unless there is a specific reason or need to do so.