So here's the N-line hitch upside down.
YES, the insert is in upside down.
So where Bushtec is using the pin and clip N-line is using a through bolt. Both are using a stop bolt with a pal nut to take any rocking out of it.
The N-Line big one piece bracket looks tremendously more robust than does the Bushtec. The Bushtec is a heavier trailer though so it's mass without an absolute requirement that it be there.
From what we're seeing here don't see any reason the more hidden Bushtec hitch would be a no-go. Use the mating piece of the N-Line hitch. Get a good local welder to cut off the old square tube and fab-up new square tube to mate and mount. Voila. Good to go. That's precisely what the N-Line guy all but directly suggested doing himself this morning.