I have yet to do a side by side comparison of output files, but the GerberX device does something different in ver7.
I already have the solution, but for those trying and failing or CadSoft:
Goal: Import gerber files to CircuitCAM 5.2.xxx
EagleCAD v7
CAM processor using GERBER_RS274X
Files fail to open in CircuitCAM 5, but WILL open in CircuitCAM7.
I loaded them some other viewers and was able to see mostly correct data, but some items were way out of spec, and a file or two failed.
Rolled back to EagleCAD v6.6, ran the same cam file on my board and importing to CircuitCAM 5.2 went smoothly.
Will add more later when I have a chance to look at the text output of both versions.