Well, the MQ25 is an entirely different product to the X-47B so, yes, I imagine there is quite a lot of design differences!
Googling JPALS gives the following slides:
PMA-213 JPALS | HTii
"While JPALS provides enhanced capability to existing aircraft, it is a critical component of the JSF’s all-weather capability and the only currently envisioned way to operate large unmanned aircraft from ships at sea."
EMALS & JPALS for the JSF - General F-35 Forum
End of page 2 has a slide with JPALS 'success' condition
That success box will probably be moving with the ship rotations so the course correction is continually recalculated.