GPP on XBox was indeed cheaper than full release. Theoretically though the program means that we play the game as is and release is not guaranteed, so it is a discount for some minor risk.
It was played on a separate server until very late, so no discoveries were carried on. We started with 100K, not 1K credits, but, of course, it does not mean much, just a few missions. Until very late it was not certain if we will keep our game progress, but in the end we did get all our ships, money and ranks. Considering it was accumulated over months, it was not a small risk too.
I don't think you'll see many PS4-specific bugs though, UI is the same across all platforms and control scheme is pretty much identical to XBox1.
Of course, GPP logo is cool and I still put it on all my ships
