No, I did an autocal with both the Spyder 4 and the Spyder 5 (facing the PJ), and compared the results using Calman and my Discus trained to my i1pro2 (facing the screen). My screen is very color neutral and has a near nominal gain, so doesn't account for much of a difference.Was your testing of the two Spyder colorimeters done strictly within CalMAN? I'm trying to make effective use of the Spyder 5 in the JVC calibration, and know if it's a dud or not, and if so, how best to deal with that. Getting it from B&H today.
The Spyder 5 was more accurate facing the screen, but the Spyder 4 was more accurate facing the PJ, which is what matters with the Autocal. The Spyder 5 led to a drop in brightness of 10-15% depending on the mode (it was overcorrecting), so I sent it back.
I documented all this recently, just go back a few posts/pages. There is a link regarding how to test the accuracy of your Spyder in the first post.