The plots shown are mine. Why would we not expect the results to be the same? It looks like Joe's plots are on a linear scale, but I am showing a log scale so of course that will not fit. I have both from the mfg. and have superimposed my plot and the mfg's linear plot onto Joe's. The e-plane point at 270 degrees should be ~-30dB, and I scaled them to make that point land on the 270deg line.
Looking just at the h-plane data, if you look at the data and my plot, it seems like the point data falls in the correct place, but my plot reaches -infinity at the center. The mfg seems to scale theirs so the center is -50dB and Joe's at a wee bit less than -30dB.
They also orient the e-plane data "pointing" to the left, but mark the left side 180 deg. Isn't it normal to start the elevation plot pointing to the right at 0 deg? I rotated my plot to make that so, but realize the plot data runs clockwise so I need to flip the trace to match the ccw scale.
I also created a test plot with the top 90 deg starting at 0 dB and as rotating clockwise, each "notch" is -3, -10, -20, -30, -40, ... -80 dB, so it seems the data points land properly.