Nothing seems unusual and the test pattern looks fine, which rules out a whole bunch of typical problems.
The X and Y Max acceleration values seem low, but you mentioned you had reduced them without affecting the problem. If the machine seems lethargic, crank them back up to whatever they were before; for lack of anything smarter, 3000 to 5000 mm/s² should be in the right ballpark.
Don’t restore the settings from an automatic backup, because you want to keep the new PWM Rising Edge settings.
In the Machine Settings → Cut Parameters, I changed the various Acceleration values to 1500 mm/s² and the various Factor values to 100%, without making any visible difference. In the Engraving Parameters section, I changed the X and Y Acceleration values to about half of the Max acceleration values you just (re)set in Axis Settings.
Other than making the machine a bit peppier, none of those changes should make any visible difference. As always, use cardboard while testing! 
With all the mechanics out of the way, back to the original problem …
The two pictures of engravings show different offsets between the inner bits and the outline, with the lighter engraving having a much larger offset. In addition, some of the inner bits seem distorted and overlaid:
If you are using the Ruida’s USB port, the problem is almost certainly USB communications jank. The fix is to use the Ruida’s Ethernet port, although you can try a better USB cable.
This discussion covers the details: